The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.

An optimist is a man who has never had much experience.

I always like to look on the optimistic side of life, but I am realistic enough to know that life is a complex matter.

I find nothing more depressing than optimism.

he place where optimism most flourishes is the lunatic asylum.

The basis of optimism is sheer terror.