We must not contradict, but instruct him that contradicts us; for a madman is not cured by another running mad also.
Observe your enemies, for they first find out your faults.
Pay attention to your enemies for they are the first to discover your mistakes.
Serve your enemies for they first find out your faults.
As iron is eaten away by rust, so the envious are consumed by their own passion.
Begin - to begin is half the work, let half still remain; again begin this, and thou wilt have finished.
Forgive many things in others; nothing in yourself.
When about to commit a base deed, respect thyself, though there is no witness.
Nothing more detestable does the earth produce than an ungrateful man.
Give me a lever long enough, and a prop strong enough, I can single-handed move the world.
Eureka! [I have found it!] On discovery of a method to test the purity of gold.
Give me a place to stand, and a lever long enough, and I will move the world.
There are things which seem incredible to most men who have not studied Mathematics.
Consider how much more you often suffer from your anger and grief, than from those very things for which you are angry and grieved.
Opinion is the main thing which does harm or good in the world. It is our false opinions that ruin us.
Consider how much more you often suffer from your anger and grief, than from those very things for which you are angry and grieved.
The curiosity to know things has been given to man as a scourge.
A faithful friend is the medicine of life.
Seek not the things that are too hard for thee, neither search the things that are beyond thy strength.
To accomplish great things we must not only act but also dream, not only plan but also believe.
Men exist for the sake of one another. Teach them then or bear with them
I had the blues because I had no shoes until upon the street, I met a man who had no feet.
Goodness does not consist in greatness, but greatness in goodness.
No man ever steps in the same river twice, for it's not the same river and he's not the same man.
The unexamined life is not worth living.
Most powerful is he who has himself in his own power.
Fas est ab hoste doceri. One should learn even from one's enemies.
Can't you see that I'm only advising you to beg yourself not to be so dumb?