It's better to be an optimist who is sometimes wrong than a pessimist who is always right

The man who is a pessimist before forty-eight knows too much; if he is an optimist after it he knows too little

Optimist: Day-dreamer more elegantly spelled

There is no sadder sight than a young pessimist, except an old optimist

The man who is a pessimist before 48 knows too much; if he is an optimist after it he knows too little.

There has to be optimism out there. I'm putting in more trees.