Though I love my country, I do not love my countrymen.

The true measure of a man is how he treats someone who can do him absolutely no good.

Sickness is mankind's greatest defect.

It is no measure of health to be well adjusted to a profoundly sick society.

One can choose to go back toward safety or forward toward growth. Growth must be chosen again and again; fear must be overcome again and again.

Men always talk about the most important things to perfect strangers.

We are not enemies, but friends. We must not be enemies. Though passion may have strained, it must not break our bonds of affection. The mystic chords of memory will swell when again touched, as surely they will be, by the better angels of our nature.

The whole universe is contained within a single human being – you.

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

The U.S. Census Bureau acknowledged this fact when it reported that those with a bachelor's degree earn on average $1 million more over their lifetime than those with only a high school diploma.

These are people who are capable of devotion, public devotion, to justice. They meant what they said and every day that passes, they mean it more.

Progress of mankind is progress of mind and intellect.

Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.

The greatest sweetener of human life is Friendship. To raise this to the highest pitch of enjoyment, is a secret which but few discover.

You may turn into an archangel, a fool, or a criminal ? no one will see it. But when a button is missing?everyone sees that.

I despise people who depend on these things [heroin and cocaine]. If you really want a mind-altering experience, look at a tree.

Our true nationality is mankind.

I can calculate the motion of heavenly bodies but not the madness of people.

I just invent, then wait until man comes around to needing what I've invented.

A desire to be observed, considered, esteemed, praised, beloved, and admired by his fellows is one of the earliest as well as the keenest dispositions discovered in the heart of man.

We may have different religions, different languages, different colored skin, but we all belong to one human race.