The wonder is, not that the field of stars is so vast, but that man has measured it.

A person is never happy except at the price of some ignorance. [The ability to focus on positives and distract your mind from negatives for at least a time is a necessary skill for being happy.]

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.

One thing above all gives charm to men's thoughts, and this is unrest. A mind that is not uneasy irritates and bores me.

Devout believers are safeguarded in a high degree against the risk of certain neurotic illnesses; their acceptance of the universal neurosis spares them the task of constructing a personal one.

If the path be beautiful, let us not ask where it leads.

Without lies humanity would perish of despair and boredom.