Every addition to true knowledge is an addition to human power.

A happy life is one spent learning, earning, and yearning.

Learning too soon our limitations, we never learn our powers.

Knowledge is a process of piling up facts; wisdom lies in their simplification.

Great minds have purposes; others have wishes.

If you know you are on the right track, if you have this inner knowledge, then nobody can turn you off... no matter what they say.

If a window of opportunity appears, don't pull down the shade.

Don't judge each day by the harvest you reap but by the seeds that you plant.

There's no use doing a kindness if you do it a day too late.

Life is about learning; when you stop learning, you die.