None but ourselves can free our minds.
It is the mark of an educated mind to be able to entertain a thought without accepting it.
What can't be cured must be endured.
Every aquarium will eventually leak.
Science may set limits to knowledge, but should not set limits to imagination.
It is neither good nor bad, but thinking makes it so.
There are no eternal facts, as there are no absolute truths.
Gravity is only the bark of wisdom's tree; but it preserves it
Do not pray for an easy life, pray for the strength to endure a difficult one.
If you only read the books that everyone else is reading, you can only think what everyone else is thinking.
Desire is the very essence of man.
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.
A perfection of means, and confusion of aims, seems to be our main problem.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
Jealousy is the tribute mediocrity pays to genius.
It is tact that is golden, not silence.
If we can really understand the problem, the answer will come out of it, because the answer is not separate from the problem.
There are four ways, and only four ways, in which we have contact with the world. We are evaluated and classified by these four contacts: what we do, how we look, what we say, and how we say it.
Do your little bit of good where you are; it's those little bits of good put together that overwhelm the world.
Man's sensitivity to the little things and insensitivity to the greatest are the signs of a strange disorder.
The more that you read, the more things you will know. The more that you learn, the more places you'll go.