Stubborn and ardent clinging to one's opinion is the best proof of stupidity.
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self.
If we know exactly where we're going, exactly how to get there, and exactly what we'll see along the way, we won't learn anything.
Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.
A house is not a home unless it contains food and fire for the mind as well as the body.
Do your little bit of good where you are; it's those little bits of good put together that overwhelm the world.
Nothing fixes a thing so intensely in the memory as the wish to forget it.
It is a cliche that most cliches are true, but then like most cliches, that cliche is untrue.
Share our similarities, celebrate our differences.
In a good bookroom you feel in some mysterious way that you are absorbing the wisdom contained in all the books through your skin, without even opening them.
Admiration is the daughter of ignorance.
The object of the superior man is truth.
The greatest deception men suffer is from their own opinions.
Intelligence is the ability to adapt to change.
The noblest pleasure is the joy of understanding.
There is geometry in the humming of the strings. There is music in the spacing of the spheres.
He who chooses the beginning of the road chooses the place it leads to.
It is divinity that shapes, not only your ends, but also your acts, your words and thoughts.
Medicine heals diseases of the body, wisdom frees the soul from passions.
There is a wisdom of the head, and... there is a wisdom of the heart.
How often it is that the angry man rages denial of what his inner self is telling him.