In so far as the soul is a force residing in the body; it has therefore been said that the properties of the soul depend of the condition of the body.

An energy is a soul — a something working in us.

All potentiality lies in the vitalising, energising power of Agni, and in His ability to stimulate. He is life itself, and the driving force of evolution, of psychic development and of consciousness. p. 606

Within the physical body every human being has a subtle body made up of invisible structures and energies (kundalini, nadis, and chakras); and within the subtle is the causal body out of which the subtle and physical bodies are formed.

It is an absolutely vain endeavor to attempt to reconstruct or even comprehend the nature of a human being by simply knowing the forces which have acted upon him. However deeply we should like to penetrate, however close we seem to be drawing to truth, one unknown quantity eludes us: man's primordial energy, his original self, that personality which was given him with the gift of life itself. On it rests man's true freedom; it alone determines his real character.

There is in each of us an ancient force that takes and an ancient force that gives. A man finds little difficulty facing that place within himself where the taking force dwells, but it’s almost impossible for him to see into the giving force without changing into something other than man. For a woman, the situation is reversed…These things are so ancient within us…that they’re ground into each separate cell of our bodies…It’s as easy to be overwhelmed by giving as by taking.

Love is the fuel of our physical and spiritual bodies.

our souls also existed apart from the body before they took on human form, and they had intelligence.

The life force that pulsates in the trees, plants, and animals is the same life force that pulsates within us. The same life energy that gives us the power to speak and to sing, is the power behind the song of the bird and the roar of the lion. The same consciousness that flows in and through every human being, lends its power to the movement of the wind, to the flow of the river, and to the light of the sun. How can there be any sense of difference once this subtle principle is understood? When we evaluate our growth and development in the light of this great Truth, we may wonder whether we human beings have really developed or grown at all. The progress that we see today is divided growth. Only some parts are growing—the world as a whole remains unhealthy. We cannot call this real progress.

The source of the inner life: adoration of Jesus Christ, God made man, because we know and believe that in Him is the only true God, and therefore we kneel and prostrate ourselves before the Holy Eucharist.

In fact, for a voluntarist like Schopenhauer, a theory so sanely and cautiously empirical and rational as that of Darwin, left out of account the inward force, the essential motive, of evolution. For what is, in effect, the hidden force, the ultimate agent, which impels organisms to perpetuate themselves and to fight for their persistence and propagation? Selection, adaptation, heredity, these are only external conditions. This inner, essential force has been called will on the supposition that there exists also in other beings that which we feel in ourselves as a feeling of will, the impulse to be everything, to be others as well as ourselves yet without ceasing to be what we are.

The natural healing force within each of us is the greatest force in getting well.

At the very center of all human life is energy, psychic energy. It is the force of that energy that drives us, that must repeatedly spend and renew itself in us, that must perpetually be reaching for something beyond itself in order to satisfy its own insatiable appetite. ("The Next Great Moment In History Is Theirs")

Our life energies are the most basic and the most powerful aspect of human beings. Though most people are unaware of it, whichever way our energies play, that’s the way our bodies and our minds and our emotions play. So, once we get the energies—the fundamentals—moving in one direction, we can make sure that our bodies, emotions, and minds are also moving in that direction. -Sadhguru