Black is like a broken vessel, which is deprived of the capacity to contain anything.

Mechanics is the paradise of the mathematical sciences because by means of it one comes to the fruits of mathematics.

I have offended God and mankind because my work didn't reach the quality it should have.

Common Sense is that which judges the things given to it by other senses.

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

Nothing will be left, Nothing in the air, nothing under the earth, nothing in the waters. All will be exterminated.

I am never weary of being useful... In serving others I cannot do enough. No labor is sufficient to tire me.