“I have six locks on my door all in a row. When I go out, I lock every other one. I figure no matter how long somebody stands there picking the locks, they are always locking three.”

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

If you have knowledge, let others light their candles in it

Habits are safer than rules. You don't have to watch them. They keep you.

History will be kind to me for I intend to write it.

The ultimate authority must always rest with the individual's own reason and critical analysis.

The fire that warms us can also consume us; it is not the fault of the fire. The fault lies in us, in our want of control.