No one demands more caution than a spy, and when someone has the skeleton key to minds, counter him by leaving the key of caution inside, on the other side of the keyhole.

The wise man does at once what the fool does finally.

Dreams will get you nowhere, a good kick in the pants will take you a long way.

He that can live alone resembles the brute beast in nothing, the sage in much, and God in everything.

It is better to sleep on things beforehand than lie awake about them afterwards.

Self-reflection is the school of wisdom.

The wise have a solid sense of silence and the ability to keep a storehouse of secrets. Their capacity and character are respected.

Know or listen to those who know.

To find one real friend in a lifetime is good fortune; to keep him is a blessing.

There are friendships merely for pleasure, some for the exchange of ideas. Rarest are those friends of one's inmost self.

A single lie destroys a whole reputation for integrity.

If you're reading this...Congratulations, you're alive.If that's not something to smile about, then I don't know what is.

If one should criticize one should always have a meaningful explanation to accompany.

The mass of men lead lives of quiet desperation.

Inclusive, good-quality education is a foundation for dynamic and equitable societies.

Anyone can repeat a technical explanation they read in a text-book or blog post.

Biographies by preachers are of no value. If they admire a man they always make him a saint, while if they dislike one, they always make him a demon.

If the Wright brother were alive today Wilbur would have to fire Orville to reduce costs.

If I were the president, I would be very concerned... and I would do what was reasonably necessary to find a way to get my people confirmed.

Consider that we shouldn't call our brother a fool, since we don't know ourselves what we are.

We need Hawaii just as much and a good deal more than we did California. It is manifest destiny.