"That all opposites — such as mass and energy, subject and object, life and death — are so much each other that they are perfectly inseparable, still strikes most of us as hard to believe. But this is only because we accept as real the boundary line between the opposites. It is, recall, the boundaries themselves which create the seeming existence of separate opposites. To put it plainly, to say that "ultimate reality is a unity of opposites" is actually to say that in ultimate reality there are no boundaries. Anywhere."

I have been vitally aware of the Law of Opposites, and this awareness has kept me reasonably serene... the drama of life... the play of truth. the quarrel of fools and frauds, male and female, the classic and the romantic, the disciplined and the free... the comic and the tragic contrasting of the opposites in all areas of possibility and on and on and on.

That axiom of Metaphysicians which is termed the principle of contradiction and which affirms that it is impossible for anything to possess a quality, and in the same time not to possess it, is a consequence of the fundamental law of thought, whose expression is x²=x.

One sees that all explicit opposites are implicit allies—correlative in the sense that they "gowith" each other and cannot exist apart. This, rather than any miasmic absorption of differences into acontinuum of ultimate goo, is the metaphysical unity underlying the world. For this unity is not mere one-ness as opposed to multiplicity, since these two terms are themselves polar. The unity, or inseparability, of one and many is therefore referred to in Vedanta philosophy as "nonduality" (advaita) to distinguish it from simple uniformity.

All contradictory things are interconnected; not only do they coexist in a single entity in given conditions, but in other given conditions, they also transform themselves into each other. This is the full meaning of the identity of opposites. This is what Lenin meant when he discussed "how they happen to be (how they become) identical--under what conditions they are identical, transforming themselves into one another".

Thus the universe is to be conceived as attaining the active self-expression of its own variety of opposites of its own freedom and its own necessity, of its own multiplicity and its own unity, of its own imperfection and its own perfection. All the opposites are elements in the nature of things, and are incorrigibly there. The concept of God is the way in which we understand this incredible fact that what cannot be, yet is.

Marxism comprises many principles, but in the final analysis they can all be brought back to a single sentence: it is right to rebel.

The Judeo-Christian heritage has left us with the view of a universe composed of warring opposites, which are valued as either good or evil. They cannot coexist.

The strong man holds in a living blend strongly marked opposites. The idealists are usually not realistic, and the realists are not usually idealistic. The militant are not generally known to be passive, nor the passive to be militant. Seldom are the humble self-assertive, or the self-assertive humble. But life at its best is a creative synthesis of opposites in fruitful harmony. The philosopher Hegel said that truth is found neither in the thesis nor the antithesis, but in the emergent synthesis which reconciles the two.

The concept of unity, in which positive and negative are attributes of the same force, in which good and evil are relative, ever-changing, and always joined to the same phenomenon — such a concept is still reserved to the physical sciences and to the few who have grasped the history of ideas.

All things come into being by conflict of opposites.

In the new historical period of Socialist Revolution and the dictatorship of the proletariat in China, Chairman Mao summed up both the positive and the negative experience of the international Communist movement, and made a penetrating analysis of the class relations in socialist society by applying the Marxist-Leninist theory of the unity of opposites, and pointed out that the principal contradiction in a socialist society is the contradiction between the proletariat and the bourgeoisie. For the first time in the history of the development of Marxism, Chairman Mao explicitly pointed out that there are still classes and class struggle after the socialist transformation of the ownership of the means of production has in the main been completed, put forward the thesis that in socialist society there are two types of contradictions--those between ourselves and the enemy and those among the people themselves, and advanced the great theory of continuing the revolution under the dictatorship of the proletariat.

In one of his theses Marx said: 'Philosophers have so far interpreted the world. The point is to change it.' Marxism sees an innate unity between perception of the past and present practice. This unity implies continuous interaction: as time passes and history (human experience) lengthens, we draw greater lessons from it for the present; and as our present experience tells us more about the possibilities and limitations of social action, we turn to the past and obtain new comprehensions of it.

In reality opposites are one; art shows this.