The dance, just as the performance of the actor, is kinesthetic art, art of the muscle sense. The awareness of tension and relaxation within his own body, the sense of balance that distinguishes the proud stability of the vertical from the risky adventures of thrusting and falling--these are the tools of the dancer.

The fundamental peculiarity of the photographic medium; the physical objects themselves print their image by means of the optical and chemical action of light.

The arts are neglected because they are based on perception, and perception is disdained because it is not assumed to involve thought.

Both art and science are bent on the understanding of the forces that shape existence, and both call for a dedication to what is. Neither of them can tolerate capricious subjectivity because both are subject to their criteria of truth. Both require precision, order, and discipline because no comprehensible statement can be made without these. Both accept the sensory world as what the Middle Ages called signatura regrum, the signature of things, but in quite different ways.

Now the work of art also represents a state of final equilibrium, of accomplished order and maximum relative entropy, and there are those who resent it. But art is not meant to stop the stream of life. Within a narrow span of duration and space the work of art concentrates a view of the human condition; and sometimes it marks the steps of progression, just as a man climbing the dark stairs of a medieval tower assures himself by the changing sights glimpsed through its narrow windows that he is getting somewhere after all.

A system is in equilibrium when the forces constituting it are arranged in such a way as to compensate each other, like the two weights pulling at the arms of a pair of scales.

As one gets older, it happens that in the morning one fails to remember the airplane trip to be taken in a few hours or the lecture scheduled for the afternoon.