The optimist proclaims that we live in the best of all possible worlds; and the pessimist fears this is true.

I can't be a pessimist because I'm alive. To be a pessimist means that you have agreed that human life is an academic matter.

Pessimism leads to weakness, optimism to power.

Every notion that any man, dead, living, or unborn, might form as to the universe will necessarily prove wrong

It amuses me to weep for a dead man with eyes that once were his.

Why is the King of Hearts the only one that hasn't a moustache?