An optimist says his cup is still half full; a pessimist declares it half-empty.

The optimist is as often wrong as the pessimist but is far happier.

You can't damage a smile by cracking it.

It isn't your position that makes you happy or unhappy; it's your disposition.

Much happiness is overlooked because it doesn't cost anything. 

Keep your face to the sun and the shadows will fall behind.

A smile is a curve that can set many things straight.

A smile is a language that even a baby understands.
 
You are not fully dressed until you wear a smile.

Happiness is not a station at which you arrive but a manner of traveling.

Happiness is not given but exchanged.

The city of happiness is in the state of mind.

The best angle to approach a problem is from try angle.

The trouble with some of us is that in trying times we quit trying.