Old minds are like old horses; you must exercise them if you wish to keep them in working order.
Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.
There is a fountain of youth: it is your mind, your talents, the creativity you bring to your life and the lives of people you love. When you learn to tap this source, you will truly have defeated age.
Nothing will work unless you do.
If you don't like something, change it. If you can't change it, change your attitude.
The illiterate of the future will not be the person who cannot read. It will be the person who does not know how to learn.