Mark TwainThinkers

50 (age) is an age at which a man can be an ass without being an optimist but not an optimist without being an ass.

70 (age) is old enough. After that there is too much risk.

Abstinence is so excellent a thing that one should totally abstain from total abstinence itself.

Accident is the greatest of all inventors.

Achievement is tied to imagination. We can only achieve what we can conceive and believe.

Action is that which speaks louder than words, but not nearly as often.

Addiction's easy to kick. Most have done it thousands of times.

An Adventure while it's happening you wish it wasn't.