You never fail until you stop trying.
Gravitation is not responsible for people falling in love.
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
Any fool can know. The point is to understand.
Creativity is intelligence having fun.
Black holes are where God divided by zero.
The world is a dangerous place to live, not because of the people who are evil, but because of the people who don’t do anything about it.
It's not that I'm so smart, it's just that I stay with problems longer.
If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut.
Everything must be made as simple as possible. But not simpler.
When you trip over love, it is easy to get up. But when you fall in love, it is impossible to stand again.
What is right is not always popular and what is popular is not always right.
In the middle of difficulty lies opportunity.
Whoever is careless with the truth in small matters cannot be trusted with important matters.
Men marry women with the hope they will never change. Women marry men with the hope they will change. Invariably they are both disappointed.
A question that sometimes drives me hazy: am I or are the others crazy?
We dance for laughter, we dance for tears, we dance for madness, we dance for fears, we dance for hopes, we dance for screams, we are the dancers, we create the dreams.
Imagination is everything. It is the preview of life’s coming attractions.
Love is a better master than duty.
If the facts don’t fit the theory, change the facts.