The Art of Flying is but newly invented, twill improve by degrees, and in time grow perfect; then we may fly as far as the Moon.

The judgment may be compared to a clock or watch, where the most ordinary machine is sufficient to tell the hours; but the most elaborate alone can point out the minutes and seconds, and distinguish the smallest differences of time.

Since the princes take the Earth for their own, it's fair that the philosophers reserve the sky for themselves and rule there, but they should never permit the entry of others.

A philosopher will not believe what he sees because he is too busy speculating about what he does not see.

I hate war, for it spoils conversation.

I feel nothing, apart from a certain difficulty in continuing to exist.

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