Knowing is not enough; we must apply. Willing is not enough; we must do.
Johann wolfgang von Goethe
A woman, especially if she have the misfortune of knowing anything, should conceal it as well as she can.
Jane Austen
I can calculate the motion of heavenly bodies but not the madness of people.
Isaac Newton
Unless you try to do something beyond what you have already mastered, you will never grow.
Ronald E. Osborn
Remember my friend, that knowledge is stronger than memory, and we should not trust the weaker.
Bram Stoker
It is sometimes easier to be happy if you don’t know everything.
Alexander McCall Smith
You can’t know, you can only believe – or not.
C.S. Lewis
Doubt … is an illness that comes from knowledge and leads to madness.
Gustave Flaubert
Information is not knowledge.
Albert Einstein
You never know what is enough unless you know what is more than enough.
William Blake