Plato

Wise men speak because they have something to say; Fools because they have to say something.

Winston Churchill

I am always ready to learn although I do not always like being taught.

Friedrich Nietzsche

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

Ernest Hemingway

I like to listen. I have learned a great deal from listening carefully. Most people never listen.Ernest Hemingway

Socrates

To know, is to know that you know nothing. That is the meaning of true knowledge.