Don't be too optimistic. The light at the end of the tunnel may be another train.

Let other pens dwell on guilt and misery.

These are not dark days: these are great days -- the greatest days our country has ever lived.

Success comes in cans, failure in can'ts.

Positive anything is better than negative nothing.

Be an optimist -- at least until they start moving animals in pairs to Cape Canaveral.

My sun sets to rise again.

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

Optimism: The doctrine or belief that everything is beautiful, including what is ugly.

In these times you have to be an optimist to open your eyes when you wake in the morning.