Never put off for tomorrow, what you can do today.

But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

It is easy to be brave at a safe distance.

Each problem that I solved became a rule which served afterwards to solve other problems.

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

Convictions are more dangerous enemies of truth than lies.

There are things known and there are things unknown, and in between are the doors of perception.

Man is not the creature of circumstances, Circumstances are the creatures of men.

There is no question climate change is happening. The only arguable point is what part humans are playing in it.

You can be rich in spirit, kindness, love and all those things that you can't put a dollar sign on.

A house is not a home unless it contains food and fire for the mind as well as the body.

If you buy what you do not need, you will need what you cannot buy.

We learn from our gardens to deal with the most urgent question of the time: How much is enough?

Think no vice so small that you may commit it, and no virtue so small that you may over look it.

Learn from the mistakes of others. You can never live long enough to make them all yourself.

To be wronged is nothing unless you continue to remember it.

Honesty is the first chapter in the book of wisdom.

And this sensitivity will create new friendships for you - friendships with trees, with birds, with animals, with mountains, with rivers, with oceans, with stars. Life becomes richer as love grows.

No one can make you feel inferior without your consent.

All the great things are simple, and many can be expressed in a single word: freedom; justice; honor; duty; mercy; hope.

Let him who would move the world first move himself.