Speak only if it improves upon the silence.

Live as if you were to die tomorrow. Learn as if you were to live forever.

Coincidence is God's way of remaining anonymous.

A leader leads by example not by force.

Remembering that I'll be dead soon is the most important tool I've ever encountered to help me make the big choices in life. Because almost everything — all external expectations, all pride, all fear of embarrassment or failure - these things just fall away in the face of death, leaving only what is truly important. Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose. You are already naked. There is no reason not to follow your heart.

Success is going from failure to failure without a loss of enthusiasm.

He who is not contented with what he has, would not be contented with what he would like to have.

The secret to creativity is knowing how to hide your sources.

Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution.

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Mistakes are always forgivable, if one has the courage to admit them.

It takes 20 years to build a reputation and five minutes to ruin it. If you think about that, you'll do things differently.

The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle. As with all matters of the heart, you'll know when you find it.

Don't count the days, make the days count.

To know your Enemy, you must become your Enemy.

Change before you have to.

Everything has its beauty but not everyone sees it.

To improve is to change. To be perfect is to change often.

The United States invariably does the right thing, after having exhausted every other alternative.

Risk comes from not knowing what you're doing.

A very rich person should leave his kids enough to do anything but not enough to do nothing.

Someone's sitting in the shade today because someone planted a tree a long time ago.

Somewhere, something incredible is waiting to be known.

Build your opponent a golden bridge to retreat across.

It does not matter how slowly you go so long as you do not stop.