Wisdom begins in wonder.
The unexamined life is not worth living.
Knowledge speaks, but wisdom listens.
He who laughs at himself never runs out of things to laugh at.
All humans by nature desire to know.
The greatest way to live with honor in this world is to be what we pretend to be.
The only true wisdom is in knowing you know nothing.
An unfulfilled life is the most miserable form of existence.
Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.
To find yourself, think for yourself.
He who is not a good servant will not be a good master.
There is no genius without a touch of madness.
The mind is everything. What you think, you become.
True knowledge exists in knowing that you know nothing.
The greatest discovery of my generation is that a human being can alter his life by altering his attitude.
It is not what we have, but what we enjoy, that constitutes our abundance.
Life must be lived as play.
Happiness is not a possession to be prized, but a quality of thought, a state of mind.
He who has a why to live can bear almost any how.
Experience is the best teacher, but it is a costly one.
The measure of a man is what he does with power.
We are what we repeatedly do. Excellence then is not an act, but a habit.
Every man is a creature of the age in which he lives.
To know what is right and not do it is the worst cowardice.
In all things of nature, there is something of the marvelous.
The essence of knowledge is, having it, to use it.
You cannot step into the same river twice.
The greatest wealth is to live content with little.
It is the mark of an educated mind to be able to entertain a thought without accepting it.
Fortune favors the bold.
Your silence gives consent.
The roots of education are bitter, but the fruit is sweet.
Courage is knowing what not to fear.
Patience is bitter, but its fruit is sweet.
The hardest thing to explain is the glaringly evident which everybody has decided not to see.
A friend to all is a friend to none.
The weak can never forgive. Forgiveness is the attribute of the strong.
No great mind has ever existed without a touch of madness.
All that is necessary for the triumph of evil is that good men do nothing.
Injustice anywhere is a threat to justice everywhere.
Nature does not hurry, yet everything is accomplished.
What we achieve inwardly will change outer reality.
Those who know do not speak. Those who speak do not know.
It is not enough to win a war; it is more important to organize the peace.
The greatest victory is that which requires no battle.