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