Be helpful to all who need your assistance, but don't overdo it. Over-helpfulness too often results in under-performance.

The world will never discover a person who is hiding in the crowd.

The voice of reason is inaudible to irrational people.

Throughout history, most of the wrongs of the world have resulted from people absolutely sure they were in the right.

When we're young, everything is possible; when we're old, possibilities are everything.

When all things are considered, happiness is a better indicator of success than success has ever been of happiness.

In all human affairs, the wisest course is to be passionate about the role of reason and reasonable about the role of passion.