The mind is everything. What you think you become.

Be devoted to conscientiousness. Guard your own mind.

More than those who hate you, more than all your enemies, an undisciplined mind does greater harm.

There is nothing so disobedient as an undisciplined mind, and there is nothing so obedient as a disciplined mind.

Age is an issue of mind over matter. If you don't mind, it doesn't matter.

There is no limit to the power of the human mind. The more concentrated it is, the more power is brought to bearon one point.