Knowledge is limited. Imagination encircles the world.

The struggle, like life itself, should be joyful.

Always be a first-rate version of yourself, instead of a second-rate version of somebody else.

Many are the wonders of the world, and none so wonderful as man.

Our prime purpose in this life is to help others.

When someone tells me “no,” it doesn't mean I can't do it, it simply means I can't do it with them.

Mistakes are almost always of a sacred nature.

I have not failed. I've just found 10,000 ways that won't work.

Only when we are brave enough to explore the darkness will we discover the infinite power of our light.

Vision is the art of seeing things invisible.

Being good to people is a wonderful legacy to leave behind.

They always say time changes things, but you actually have to change them yourself.