You cannot step into the same river twice.

None so deaf as those that will not hear. None so blind as those that will not see.

The winds and the waves are always on the side of the ablest navigators.

Do not seek to follow in the footsteps of the wise. Seek what they sought.

The very essence of instinct is that it's followed independently of reason.

If you do what you've always done, you'll get what you've always gotten.

The pine stays green in winter... wisdom in hardship.

I hear, I know. I see, I remember. I do, I understand.

After all is said and done, more is said than done.

Fortune favors the prepared mind.

Yesterday's home runs don't win today's games.

It isn't the mountain ahead that wears you out; it's the grain of sand in your shoe.

One can never consent to creep when one feels an impulse to soar.

We don't see things as they are, we see them as we are.

Rarely do we find men who willingly engage in hard, solid thinking. There is an almost universal quest for easy answers and half-baked solutions. Nothing pains some people more than having to think.

There is nothing more uncommon than common sense.

Talent does what it can; genius does what it must.

A brainy person does not abuse copyright; instead they respect it and uphold it.

Think for yourselves and let others enjoy the privilege to do so, too.

United we stand, divided we fall.

To be is to do.

In wisdom gathered over time I have found that every experience is a form of exploration.

I have always thought the actions of men the best interpreters of their thoughts.

People who know little are usually great talkers, while men who know much say little.

Well begun is half done.

Character is what a man is in the dark.

Subtlety may deceive you; integrity never will.

A certain amount of opposition is a great help to a man. Kites rise against, not with, the wind.

We may pass violets looking for roses. We may pass contentment looking for victory.

It is quality rather than quantity that matters.

Others have seen what is and asked why. I have seen what could be and asked why not.

In the kingdom of the blind, the one-eyed man is king.

Whoever undertakes to set himself up as a judge of Truth and Knowledge is shipwrecked by the laughter of the gods.

True greatness consists in being great in little things.

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.

If I am what I have and if I lose what I have who then am I?

He who defends everything defends nothing.

We all have ability. The difference is how we use it.

Intellectuals solve problems, geniuses prevent them.

A man should look for what is, and not for what he thinks should be.

I believe things cannot make themselves impossible.

The actions of men are the best interpreters of their thoughts.

Patience and tenacity are worth more than twice their weight of cleverness.

No snowflake in an avalanche ever feels responsible.

Tell me to what you pay attention and I will tell you who you are.

The precision of naming takes away from the uniqueness of seeing.

Many a man curses the rain that falls upon his head, and knows not that it brings abundance to drive away the hunger.

If not me, who? And if not now, when?

Lend yourself to others, but give yourself to yourself.

We can believe what we choose. We are answerable for what we choose to believe.