The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes.

I learned the value of hard work by working hard.

In youth we learn; in age we understand.

Learning never exhausts the mind.

Do your best and keep learning - that's what I believe in.

The only good is knowledge, and the only evil is ignorance.

Millions saw the apple fall, but Newton was the one who asked why.

Don't give up. Obstacles can be overcome through strategy and learning.

Curiosity is the wick in the candle of learning.

Education is what remains after one has forgotten what one has learned in school.