If then nature makes nothing without some end in view, nothing to no purpose, it must be that nature has made all of them for the sake of man.

It is during our darkest moments that we must focus to see the light.

Happiness depends upon ourselves.

Educating the mind without educating the heart is no education at all.

Adventure is worthwhile.

Patience is bitter, but its fruit is sweet.

Love is composed of a single soul inhabiting two bodies.

Education is an ornament in prosperity and a refuge in adversity.

Be a free thinker and don't accept everything you hear as truth. Be critical and evaluate what you believe in.

Knowing yourself is the beginning of all wisdom.

Criticism is something we can avoid easily by saying nothing, doing nothing, and being nothing.

Anybody can fail.

Real change requires you to change your behavior-not just your attitude.

Ladies, most of you have no idea how beautiful you are. Don't let mean words from an insecure soul blind you from the truth of your beauty. You are beautiful by design... just the way you are.

I think we've made tremendous progress on racism. We've even made progress on war. We've made almost no progress on poverty.

Never loan money to friends or family that you are not able to write off entirely.

I try to show the public that chemistry, biology, physics, astrophysics is life. It is not some separate subject that you have to be pulled into a corner to be taught about.

Here is a paradox. It would seem that there cannot be surrealism and photography, but only photography or surrealism.

Terrorists and murderers are so dangerous. We shouldn't fall victim to believe that they are immune.

I call it viewing from afar, they call it stalking.

Use, do not abuse; neither abstinence nor excess ever renders man happy.