Pleasure in the job puts perfection in the work.

Just because something doesn't do what you planned it to do doesn't mean it's useless.

Inspiration can hit you in the head at any time in any context. It could happen in a conversation. Talking to someone at a party, you can get an idea. But you've got to remember those inspirations.

Infinite striving to be the best is man's duty; it is its own reward. Everything else is in God's hands.

Those who know how to think need no teachers. 

A weak man is just by accident. A strong but non-violent man is unjust by accident.

We here highly resolve that these dead shall not have died in vain - that this nation, under God, shall have a new birth of freedom - and that government of the people, by the people, for the people, shall not perish from the earth.

Thousands of candles can be lighted from a single candle, and the life of the candle will not be shortened. Happiness never decreases by being shared.

Where freedom is menaced or justice threatened or where aggression takes place, we cannot be and shall not be neutral.

I want to put a ding in the universe.

Strength does not come from physical capacity. It comes from an indomitable will.

Money is not the only answer, but it makes a difference.