A man who views the world the same at fifty as he did at twenty has wasted thirty years of his life.
Look deep into nature, and then you will understand everything better.
When you realise how perfect everything is you will tilt your head back and laugh at the sky
Genius is one percent inspiration and ninety-nine percent perspiration.
There are three classes of people: those who see, those who see when they are shown, those who do not see.
Wisdom is not wisdom when it is derived from books alone.
A wise man can learn more from a foolish question than a fool can learn from a wise answer.
The greatest lesson in life is to know that even fools are right sometimes.
Tell me and I forget. Teach me and I remember. Involve me and I learn.
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say there is more stupidity than hydrogen, and that is the basic building block of the universe.
I hear and I forget. I see and I remember. I do and I understand.
The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
The way I see it, if you want the rainbow, you gotta put up with the rain.
Wise men speak because they have something to say; Fools because they have to say something.
Have no fear of perfection - you'll never reach it.
Simplicity is the ultimate sophistication.
The only difference between me and a madman is that I'm not mad.
Electric communication will never be a substitute for the face of someone who with their soul encourages another person to be brave and true.
True friends stab you in the front.
Every man builds his world in his own image. He has the power to choose, but no power to escape the necessity of choice.
It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.
A picture is a poem without words.
The time to repair the roof is when the sun is shining.
Never let your sense of morals get in the way of doing what's right.
If you do not change direction, you may end up where you are heading.
The best way to predict the future is to create it.
He who is not courageous enough to take risks will accomplish nothing in life.
An ant on the move does more than a dozing ox.
Choose a job you love, and you will never have to work a day in your life.
I am so clever that sometimes I don't understand a single word of what I am saying.
Always forgive your enemies - nothing annoys them so much.
It isn't the mountains ahead to climb that wear you out; it's the pebble in your shoe.
Innovation distinguishes between a leader and a follower.
It is the mark of an educated mind to be able to entertain a thought without accepting it.
You are not only responsible for what you say, but also for what you do not say.
The chief function of the body is to carry the brain around.
It is no use saying, 'We are doing our best.' You have got to succeed in doing what is necessary.
A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.
Better a diamond with a flaw than a pebble without.
A hero is someone who understands the responsibility that comes with his freedom.
Intelligence without ambition is a bird without wings.
If everyone is moving forward together, then success takes care of itself.
Force and mind are opposites; morality ends where a gun begins.
It is better to offer no excuse than a bad one.
One of my favorite philosophical tenets is that people will agree with you only if they already agree with you. You do not change people's minds.
When anger rises, think of the consequences.
When I let go of what I am, I become what I might be.
There is more stupidity than hydrogen in the universe, and it has a longer shelf life.
Be yourself, everyone else is already taken