Friends are born, not made.
A teacher affects eternity; he can never tell where his influence stops.
They know enough who know how to learn.
The progress of evolution from President Washington to President Grant was alone evidence to upset Darwin.
No man means all he says, and yet very few say all they mean, for words are slippery and thought is viscous.
The difference is slight, to the influence of an author, whether he is read by five hundred readers, or by five hundred thousand; if he can select the five hundred, he reaches the five hundred thousand.
Only on the edge of the grave can man conclude anything.
A friend in power is a friend lost.
Simplicity is the most deceitful mistress that ever betrayed man.
All experience is an arch, to build upon.
Nothing in education is so astonishing as the amount of ignorance it accumulates in the form of inert facts.
He too serves a certain purpose who only stands and cheers.
Young men have a passion for regarding their elders as senile.
Some day science may have the existence of mankind in power, and the human race can commit suicide by blowing up the world.
At best, the renewal of broken relations is a nervous matter.
Knowledge of human nature is the beginning and end of political education.
Morality is a private and costly luxury.
Susceptibility to the highest forces is the highest genius.
Chaos was the law of nature; Order was the dream of man.
Chaos often breeds life, when order breeds habit.