Act that your principle of action might safely be made a law for the whole world.

Thinking in pictures precedes thinking in words.

The schematicism by which our understanding deals with the phenomenal world ... is a skill so deeply hidden in the human soul that we shall hardly guess the secret trick that Nature here employs.

Always recognize that human individuals are ends, and do not use them as means to your end.

Deaths, births, and marriages, considering how much they are separately dependent on the freedom of the human will, should seem to be subject to no law according to which any calculation could be made beforehand of their amount; and yet the yearly registers of these events in great countries prove that they go on with as much conformity to the laws of nature as the oscillations of the weather.

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

In all judgements by which we describe anything as beautiful, we allow no one to be of another opinion.