the pessimist complains about the wind,
the optimist expects it to change,
and the realist adjusts the sails.

My pessimism extends to the point of even suspecting the sincerity of other pessimists.

The spirit of the gospel is optimistic. It trusts in God and looks on the bright side of things. The opposite or pessimistic drags men down and away from God, looks on the dark side, murmurs, complains, and is slow to yield obedience.

A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.