Art is purposiveness without purpose. - Immanuel Kant

Phenomena of the external sense are examined and set forth in physics; those of the internal sense in empirical psychology. Pure mathematics considers space in geometry and time in pure mechanics. To these is to be added a certain concept, intellectual to be sure in itself, but whose becoming actual in the concrete requires the auxiliary notions of time and space in the successive addition and simultaneous juxtaposition of separate units, which is the concept of number treated in arithmetic.

The busier we are, the more acutely we feel that we live, the more conscious we are of life.

Act only according to that maxim by which you can at the same time will that it should become a universal law.