Man was born to live with his fellow human beings. Separate him, isolate him, his character will go bad, a thousand ridiculous affects will invade his heart, extravagant thoughts will germinate in his brain, like thorns in an uncultivated land.

It is said that desire is a product of the will, but the converse is in fact true: will is a product of desire.

In order to get as much fame as one's father one has to much more able than he.

Which is the greater merit, to enlighten the human race, which remains forever, or to save one's fatherland, which is perishable?

You risk just as much in being credulous as in being suspicious.

Does anyone really know where they're going to?

Time, matter, space - all, it may be, are no more than a point.