The only path by which another person can upset you is through your own thought.

Life is like riding a bicycle. To keep your balance, you must keep moving.

Anyone who has never made a mistake has never tried anything new.

Thinking is the talking of the soul with itself.

A man is but the product of his thoughts. What he thinks he becomes.

Insanity is doing the same thing over and over again and expecting different results.

The highest possible stage in moral culture is when we recognise that we ought to control our thoughts.

Only a life lived for others is a life worthwhile.

Once we accept our limits, we go beyond them.