“If you add something to a painting, never let it be for aesthetic reasons. Only let it be for reasons of expression.”

“Why do I paint? In my work as a mathematician, form, structure, and economy of expression are important. In music, add tone quality, balance and harmony. And now in painting, these aesthetic values are enhanced by color, contrast, and composition.”

“Let us consider the reason of the case. For nothing is law that is not reason.”

“Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present.”

“Let your desires be governed by reason.”
Appetitus rationi pareat.

“Let us work without reasoning," said Martin; "it is the only way to make life endurable.”

“We don't have to know,
only to be:
let go the jumble of worn words,
reason and vanity.”

“The only emotions that you can heal are the ones that you let yourself feel and express.”

“To express yourself needs a reason, but expressing yourself is the reason.”

“Let us proclaim it aloud, let us proclaim it in our fall and in our defeat, this is the greatest of all ages! and do you know the reason why? because it is the mildest.”