We are what we repeatedly do. Excellence, then, is not an act, but a habit.
What is a friend? A single soul dwelling in two bodies.
It is the mark of an educated mind to be able to entertain a thought without accepting it.
Pleasure in the job puts perfection in the work.
Happiness depends upon ourselves.
I count him braver who overcomes his desires than him who conquers his enemies; for the hardest victory is over self.
Poverty is the parent of revolution and crime.
The roots of education are bitter, but the fruit is sweet.
The educated differ from the uneducated as much as the living from the dead.
All men by nature desire knowledge.
For the things we have to learn before we can do them, we learn by doing them.
All human actions have one or more of these seven causes: chance, nature, compulsion, habit, reason, passion, and desire.
No great genius has ever existed without some touch of madness.
In all things of nature there is something of the marvelous.
The worst form of inequality is to try to make unequal things equal.
The energy of the mind is the essence of life.
A friend to all is a friend to none.
Nature does nothing uselessly.
Those who educate children well are more to be honored than they who produce them; for these only gave them life, those the art of living well.
The best friend is the man who in wishing me well wishes it for my sake.
Quality is not an act, it is a habit.