One thorn of experience is worth a whole wilderness of warning.

Any fool can know. The point is to understand.

I hope our wisdom will grow with our power, and teach us, that the less we use our power the greater it will be.

He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.

I've learned silence from the talkative, toleration from the intolerant, and kindness from the unkind.

If a man empties his purse into his head, no man can take it away from him. An investment in knowledge always pays the best interest.

An organizations ability to learn, and translate that learning into action rapidly, is the ultimate competitive advantage.

A learned blockhead is a greater blockhead than an ignorant one.

I keep six honest serving men (they taught me all I knew); Their names are What and Why and When And How and Where and Who.