You should prefer a good scientist without literary abilities than a literate one without scientific skills

He who does not understand the supreme certainty of mathematics is wallowing in confusion.

I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.

The painter's mind is a copy of the divine mind, since it operates freely in creating the many kinds of animals, plants, fruits, landscapes, countrysides, ruins, and awe-inspiring places.

Happy will they be who lend ear to the words of the dead.

The moment is timeless.

O speculators about perpetual motion, how many vain chimeras have you created in the like quest? Go and take your place with the seekers after gold.