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.

The object of education is not to fill a man's mind with facts; it is to teach him how to use his mind in thinking.

Economy has frequently nothing whatever to do with the amount of money being spent, but with the wisdom used in spending it.

The truth frequently seems unreasonable; the truth frequently is depressing; the truth sometimes seems to be evil, but it has the eternal advantage, it is the truth and what is built thereon neither brings nor yields to confusion.

The only true test of values, either of men or of things, is that of their ability to make the world a better place in which to live.

Luck and destiny are the excuses of the world's failures.

Thinking is the hardest work there is, which is probably the reason why so few engage in it.