There is only one good, that is knowledge; there is only one evil, that is ignorance.
To Unlearn is as hard as to Learn.
People never know each other until they have eaten a certain amount of salt together.
The good of man is the active exercise of his soul’s faculties. This exercise must occupy a complete lifetime. One swallow does make a spring, nor does one fine day. Excellence is a habit, not an event.
In inventing a model we may assume what we wish, but should avoid impossibilities.
It is the mark of an educated man to look for precision in each class of things just so far as the nature of the subject admits.
The wise man knows of all things, as far as possible, although he has no knowledge of each of them in detail.
All people by nature desire to know. An example of this is the delight we take in our senses; for even apart from their usefulness they are loved for themselves.
The true friend of the people should see that they be not too poor, for extreme poverty lowers the character of the democracy.
Nothing in life is more necessary than friendship.
In a race, the quickest runner can never overtake the slowest, since the pursuer must first reach the point whence the pursued started, so that the slower must always hold a lead.
If everything when it occupies an equal space is at rest, and if that which is in locomotion is always occupying such a space at any moment, the flying arrow is therefore motionless.
Our actions determine our dispositions.
There is no genius who hasn’t a touch of insanity.
The science that studies the supreme good for man is politics.
Some believe it to be just friends wanting, as if to be healthy enough to wish health.
Pleasure causes us to do base actions and pain causes us to abstain from doing noble actions.
No democracy can exist unless each of its citizens is as capable of outrage at injustice to another as he is of outrage at injustice to himself.
The complete man must work, study and wrestle.
Greatness of spirit is accompanied by simplicity and sincerity.