Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

Tomorrow hopes we have learned something from yesterday.

The simple things are also the most extraordinary things, and only the wise can see them.

The future is uncertain but the end is always near.

Be sure you put your feet in the right place, then stand firm.

Nature is pleased with simplicity. And nature is no dummy

No man has any natural authority over his fellow men.

Kind words don't cost much. Yet they accomplish much.

Experience is the only prophecy of wise men.

What's done can't be undone.

The secret of life, though, is to fall seven times and to get up eight times.

By three methods we may learn wisdom: first, by reflection which is noblest; second, by imitation, which is the easiest; and third, by experience, which is the bitterest.

Creativity is the process of having original ideas that have value.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

One must wait until the evening to see how splendid the day has been.

It is a cliche that most cliches are true, but then like most cliches, that cliche is untrue.

Good advice is always certain to be ignored, but that's no reason not to give it.

There is a wisdom of the head, and... there is a wisdom of the heart.

As the soft yield of water cleaves obstinate stone, So to yield with life solves the insolvable: To yield, I have learned, is to come back again.

There is nothing more uncommon than common sense.

It takes a lot of courage to show your dreams to someone else.