We must sail sometimes with the wind and sometimes against it - but we must sail, and not drift, nor lie at anchor.

Oliver Wendell Holmes

Leave all the afternoon for exercise and recreation, which are as necessary as reading. I will rather say more necessary because health is worth more than learning.

Thomas Jefferson

Ninety percent of my game is mental. It's my concentration that has gotten me this far.

Chris Evert

Self-discipline is that which, next to virtue, truly and essentially raises one man above another.

Joseph Addison

The ability to discipline yourself to delay gratification in the short term in order to enjoy greater rewards in the long term is the indispensable prerequisite for success.

Maxwell Maltz

Work on yourself more than you do on your job.

Jim Rohn