Of mankind we may say in general they are fickle, hypocritical, and greedy of gain.
Stupid men are often capable of things the clever would not dare to contemplate...
Human history becomes more and more a race between education and catastrophe.
If you want to know what a man's like, take a good look at how he treats his inferiors, not his equals.
Private passions tire and exhaust themselves, public ones never.
I can calculate the motion of heavenly bodies but not the madness of people.
It is no measure of health to be well adjusted to a profoundly sick society.
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.
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.
Everything can be taken from a man or a woman but one thing: the last of human freedoms to choose one's attitude in any given set of circumstances, to choose one's own way.
The true measure of a man is how he treats someone who can do him absolutely no good.
Take away paradox from the thinker and you have a professor.
Great minds discuss ideas. Average minds discuss events. Small minds discuss people.
A human being is a deciding being.
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.
If you can't say something good about someone, sit right here by me.
Human history is in essence a history of ideas.
Progress of mankind is progress of mind and intellect.
I despise people who depend on these things [heroin and cocaine]. If you really want a mind-altering experience, look at a tree.
One of the greatest diseases is to be nobody to anybody.
I just invent, then wait until man comes around to needing what I've invented.