The fundamental... the basic law of life is the law of cause and effect... the law of Karma as they call it in the east. It was put out by Jesus very simply in His time in a way that would be understood by the farmers... as you sow, so shall you reap... it's the basic law of life.

Karma ~ An immutable law, which has its aspect just in the akasa principle, is the law of cause and effect. Each cause sets free a corresponding effect. This law works everywhere as the most sublime rule. Consequently every deed proceeds from a cause or is followed by any result. Therefore we should not only accept Karma as a rule for our good actions, as the oriental philosophy puts it, but its signification reaches farther and is a very deep one. Instinctively all men have the feeling that something good can bring good results only and again all the evil must end up with evil or, in the words of a proverb, “Whatsoever a man sows, that shall he reap”. Everybody is bound to know this law and to respect it. This law of cause and effect governs the elemental principles, too. I have no intention to enter into details of this law, which could be expressed in a few words, as they are quite clear so that every reasonable man will understand them. Subject to this law of cause and effect is also the law of evolution or development. Thus development is an aspect of the karma law.

Men will learn and understand the subtle laws which govern their lives: the basic law of life, the Law of Karma, of Cause and Effect, which controls the destiny of all; the related Law of Rebirth, which makes possible the journey of the Soul in matter; the Law of Harmlessness, which governs right relationship, and the great Law of Sacrifice by which all evolution proceeds. Through an understanding of these laws, men will come to resemble their Mentors, their Elder Brothers, and to demonstrate the Divinity shared by all. They will hearken to the teaching of the Wise Ones and, step by step, inherit their Birthright. Men are born to become Gods and nought can change that destiny; the timing, only, lies in men’s hands. Soon the world will know that the One for Whom men wait is now among us. p. 25

The fundamental law of life is the law of cause and effect and therefore we have to be harmless, because if we are destructive, we're destroying the equilibrium of everybody.

Our Buddhist culture taught us from our young days how we should keep in mind our welfare not only in this life but also in the afterlife as well in whatever we think, say or do. Belief in Rebirth and the Karmic Law – Law of Cause and Effect, were two fundamental teachings we were taught to keep in mind. Economics and Politics or any other department of life cannot function without adverse consequences if we resort to unrighteous or wrongful ways. Good ends can be realised only by good means.

Things don't just happen in this world of arising and passing away. We don't live in some kind of crazy, accidental universe. Things happen according to certain laws, laws of nature. Laws such as the law of karma, which teaches us that as a certain seed gets planted, so will that fruit be.

Applied to man's moral life it is the law of ethical causation, justice, reward and punishment; the cause for birth and rebirth, yet equally the means for escape from incarnation. Viewed from another point it is merely effect flowing from cause, action and reaction, exact result for every thought and act. It is act and the result of act; for the word's literal meaning is action. Theosophy views the Universe as an intelligent whole, hence every motion in the Universe is an action of that whole leading to results, which themselves become causes for further results. Viewing it thus broadly, the ancient Hindus said that every being up to Brahma was under the rule of Karma.

Theosophy explains to us the laws under which this school-life must be lived, and in that way gives a great advantage to its students. The first great law is that of evolution... The second great law under which this evolution is taking place is the law of cause and effect. There can be no effect without its cause, and every cause must produce its effect. They are in fact not two but one, for the effect is really part of the cause, and he who sets one in motion sets the other also. There is in Nature no such idea as that of reward or punishment, but only of cause and effect. Anyone can see this in connection with mechanics or chemistry... Chapter VII

No new artistic system will withstand the pressure of a growing new culture until the very foundation of Art will be erected on the real laws of life.
Until all artists will say with us...
All is a fiction... only life and its laws are authentic and in life only the active is beautiful and wise and strong and right, for life does not know beauty as an aesthetic measure... efficacious existence is the highest beauty.
Life knows neither good nor bad nor justice as a measure of morals... need is the highest and most just of all morals.
Life does not know rationally abstracted truths as a measure of cognizance, deed is the highest and surest of truths.
Those are the laws of life. Can art withstand these laws if it is built on an abstraction, on mirage, and fiction?...

The basic rules of life are no different today than they were in the past. If we want to live well and do our best while we are in this world, then we must live in accordance with the flow of nature as it finds expression both inside of us and outside of us. We must honor the rights and feelings of our spouses, children, neighbors and coworkers. If we want to begin a new business enterprise, we must respect the marketplace and take into consideration all of the many factors that will go into making our efforts pay off. If we want to improve the governance of our societies, then we must pay close attention to the needs of the people as we strive to set an example that is worthy of their natural and heartfelt respect. The imperative that we live in accordance with the natural laws of nature and the human heart is even more important for those of us who call ourselves Buddhists. Above all others, we must strive to set examples that inspire and comfort our fellow beings. Our words must be truthful and our motives must be pure, for this is the only way that we can ever hope to be of lasting value to others. In seeking this way of being, we will find that we are conforming perfectly to the way of nature as well, for the Tao of nature lies as much in our hearts as it does in the world that surrounds us.

Nature and karma are similar, if not the same. When we do something good for the world, a good reward comes to us. When we do something evil to the world, a painful retribution results. Cause and effect form the spokes on a wheel that turns continuously, without beginning or end. Our very lives themselves are the temporary manifestations of a process of cause and effect that has been going on for eons. Already, each one of us has lived and died a thousand thousand times. Death is the beginning of a new life, while each life is the start of a new death that is yet to come. If this point is properly understood, we should be able to see that death is never an absolute end to anything and that life is never an absolute condition that persists without change.

Please don't say lightly that these are just religious concepts and not practical. These are laws governing human conduct, which apply as rigidly as the law of gravity. When we disregard these laws in any walk of life, chaos results. Through obedience to these laws this world of ours will enter a period of peace and richness of life beyond our fondest dreams. The key word for our time is practice. We have all the light we need, we just need to put it into practice.

Karma is an unfamiliar word for Western ears. It is the name adopted by Theosophists of the nineteenth century for one of the most important of the laws of nature. Ceaseless in its operation, it bears alike upon planets, systems of planets, races, nations, families, and individuals. It is the twin doctrine to reincarnation. So inextricably interlaced are these two laws that it is almost impossible to properly consider one apart from the other. No spot or being in the universe is exempt from the operation of Karma, but all are under its sway, punished for error by it yet beneficently led on, through discipline, rest, and reward, to the distant heights of perfection. It is a law so comprehensive in its sweep, embracing at once our physical and our moral being, that it is only by paraphrase and copious explanation one can convey its meaning in English. For that reason the Sanskrit term Karma was adopted to designate it.

Karma (Sk.). Physically, action: metaphysically, the LAW OF RETRIBUTION, the Law of cause and effect or Ethical Causation. Nemesis, only in one sense, that of bad Karma. It is the eleventh Nidana in the concatenation of causes and effects in orthodox Buddhism ; yet it is the power that controls all things, the resultant of moral action, the meta physical Samskâra, or the moral effect of an act committed for the attainment of something which gratifies a personal desire. There is the Karma of merit and the Karma of demerit. Karma neither punishes nor rewards, it is simply the one Universal LAW which guides unerringly, and, so to say, blindly, all other laws productive of certain effects along the grooves of their respective causations. When Buddhism teaches that “Karma is that moral kernel (of any being) which alone survives death and continues in transmigration ‘or reincarnation, it simply means that there remains naught after each Personality but the causes produced by it; causes which are undying, i.e., which cannot be eliminated from the Universe until replaced by their legitimate effects, and wiped out by them, so to speak, and such causes—unless compensated during the life of the person who produced them with adequate effects, will follow the reincarnated Ego, and reach it in its subsequent reincarnation until a harmony between effects and causes is fully reestablished.