We may have different religions, different languages, different colored skin, but we all belong to one human race.
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.
Human nature is not totally fixed, but on any realistic scale, evolutionary processes are much too slow to affect it.
All sins are attempts to fill voids.
He who makes a beast of himself gets rid of the pain of being a man.
I despise people who depend on these things [heroin and cocaine]. If you really want a mind-altering experience, look at a tree.
If you want to know what a man's like, take a good look at how he treats his inferiors, not his equals.
The great gift of human beings is that we have the power of empathy, we can all sense a mysterious connection to each other.
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.
One of the greatest diseases is to be nobody to anybody.
Of mankind we may say in general they are fickle, hypocritical, and greedy of gain.
A man has to learn that he cannot command things, but that he can command himself; that he cannot coerce the wills of others, but that he can mold and master his own will: and things serve him who serves Truth; people seek guidance of him who is master of himself.
Though I love my country, I do not love my countrymen.
That man is the noblest creature may also be inferred from the fact that no other creature has yet contested this claim.
People who know little are usually great talkers, while men who know much say little.
People seldom do what they believe in. They do what is convenient, then repent.
A person's a person, no matter how small.
If you can't say something good about someone, sit right here by me.
Sickness is mankind's greatest defect.
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.
Progress of mankind is progress of mind and intellect.