Knowledge speaks, but wisdom listens.
A friend is someone who knows all about you and still loves you.
To know what you know and what you do not know, that is true knowledge.
The more a man knows, the more he forgives.
If money is your hope for independence you will never have it. The only real security that a man will have in this world is a reserve of knowledge, experience, and ability.
Having an education is one thing, being educated is another.
The greatest enemy of knowledge is not ignorance, it's the illusion of knowledge.
Know more about yourself than others know about you.
The greatest obstacle to discovery is not ignorance - it is the illusion of knowledge.
He who knows little quickly tells it.
When you cease to strive to understand, then you will know without understanding.
Be curious always! For knowledge will not acquire you: you must acquire it.
You must look at who you are and make an effort to know yourself, which is the most difficult knowledge one can imagine.
Real knowledge is to know the extent of one's ignorance.
He who does not know one thing knows another