Don't cling to a mistake just because you spent a lot of time making it.

Aubrey de Grey

You wouldn't worry so much about what others think of you if you realized how seldom they do.

Olin Miller

Be thankful for problems. If they were less difficult, someone with less ability might have your job.

Jim Lovell

Most of us have two lives: the life we live, and the unlived life within us. Between the two stands Resistance.

Steven Pressfield

All growth depends upon activity. There is no development physically or intellectually without effort, and effort means work.

Calvin Coolidge

Being extremely honest with oneself is a good exercise.

Sigmund Freud