As astronomy is the daughter of idleness, geometry is the daughter of property.

A man finds no sweeter voice in all the world than that which chants his praise.

Behold a universe so immense that I am lost in it. I no longer know where I am. I am just nothing at all. Our world is terrifying in its insignificance.

A true philosopher is like an elephant; he never puts the second foot down until the first one is solidly in place.

It is high time for me to depart, for at my age I now begin to see things as they really are.

Hardly anyone knows how much is gained by ignoring the future.

We must always skim over pleasures. They are like marshy lands that we must travel nimbly, hardly daring to put down our feet.