Important principles may, and must, be inflexible.
After all is said and done, more is said than done.
United we stand, divided we fall.
It's not that I'm so smart, it's just that I stay with problems longer.
Once we accept our limits, we go beyond them.
Whoever undertakes to set himself up as a judge of Truth and Knowledge is shipwrecked by the laughter of the gods.
Intellectuals solve problems, geniuses prevent them.
A man should look for what is, and not for what he thinks should be.
There are three musts that hold us back: I must do well. You must treat me well. And the world must be easy.
We have all the light we need, we just need to put it in practice.
To work with the hands or brain, according to our requirements and our capacities, to do that which lies before us to do, is more honorable than rank and title.
Truth has no special time of its own. Its hour is now - always.
There are things known and there are things unknown, and in between are the doors of perception.
It is easier to fight for one's principles than to live up to them.
We don't see things as they are, we see them as we are.
You cannot push any one up a ladder unless he be willing to climb a little himself.
Memory is more indelible than ink.
The final forming of a person's character lies in their own hands.
In wisdom gathered over time I have found that every experience is a form of exploration.
Courage is the first of human qualities because it is the quality which guarantees the others.
We forfeit three-quarters of ourselves in order to be like other people.
There are no new ideas. There are only new ways of making them felt.
You can't stay in your corner of the forest waiting for others to come to you. You have to go to them sometimes.
Yesterday's home runs don't win today's games.
We may pass violets looking for roses. We may pass contentment looking for victory.
Talent is a flame. Genius is a fire.
Genius is never understood in its own time.
Our nature is the mind. And the mind is our nature.
Man is born to live and not to prepare to live.
Everything that is beautiful and noble is the product of reason and calculation.
The very essence of instinct is that it's followed independently of reason.
High achievement always takes place in the framework of high expectation.
Believe and act as if it were impossible to fail.
True greatness consists in being great in little things.
We all have ability. The difference is how we use it.
When all else is lost, the future still remains.
I hear, I know. I see, I remember. I do, I understand.
I hear and I forget. I see and I remember. I do and I understand.
I'm reading a book, because I'm brainy. No, it is a book - if you don't know, it is like a blog except bigger.
We are what we believe we are.
We are not permitted to choose the frame of our destiny. But what we put into it is ours.
The soul is placed in the body like a rough diamond, and must be polished, or the luster of it will never appear.
There is no fixed physical reality, no single perception of the world, just numerous ways of interpreting world views as dictated by one's nervous system and the specific environment of our planetary existence.
Nothing exists except atoms and empty space; everything else is opinion.
In the kingdom of the blind, the one-eyed man is king.
Fortune favors the audacious.
If in doubt, don't. If still in doubt, do what's right.
Character is what a man is in the dark.
The universe is full of magical things, patiently waiting for our wits to grow sharper.