The man of science multiples the points of contact between man and nature.

Distrust even Mathematics; albeit so sublime and highly perfected, we have here a machine of such delicacy it can only work in vacuo, and one grain of sand in the wheels is enough to put everything out of gear. One shudders to think to what disaster such a grain of sand may bring a Mathematical brain. Remember Pascal.

Change is the essence of life.

I thank fate for having made me born poor. Poverty taught me the true value of the gifts useful to life.

I prefer the folly of enthusiasm to the indifference of wisdom.

The first virtue of all really great men is that they are sincere. They eradicate hypocrisy from their hearts.

Man is a rational animal. He can think up a reason for anything he wants to believe.