No human investigation can claim to be scientific if it doesn't pass the test of mathematical proof.

If you put on more clothes as the cold increases, it will have no power to hurt you. Let us hope that.

Art lives from constraints and dies from freedom.

Where there is shouting, there is no true knowledge.

An artist who lacks the power of self-criticism accomplishes but little. It is good if your work stands higher than your own opinion of it; bad if it is on the same level. But it is a great disaster if your work stands lower than your judgment of it.

Your brain is much better than you think; just use it!

O time, swift robber of all created things, how many kings, how many nations hast thou undone, and how many changes of states and of various events have happened since the wondrous forms of this fish perished here in this cavernous and winding recess. Now destroyed by time thou liest patiently in this confined space with bones stripped and bare; serving as a support and prop for the superimposed mountain.