Nothing of any importance can be taught. It can only be learned, and with blood and sweat.

Education is an admirable thing. But it is well to remember from time to time that nothing that is worth knowing can be taught.

Anything worth knowing cannot be understood by the human mind.

"You know what Oscar Wilde said, ma'am? He said, "nothing that is worth knowing can be taught". Nothing personal, ma'am... Carry on."

You could never teach other people anything that mattered. The important things they had to learn for themselves, almost always by making mistakes, so that the lessons arrived too late to help. Experience was in that sense useless. It was precisely what could not be passed along in a lesson or an equation.

Knowledge is of no value unless you put it into practice.

Knowledge has no value except that which can be gained from its application towards some worthy end.

It is impossible to begin to learn that which one thinks one already knows.

Man can learn nothing unless he proceeds from the known to the unknown.

Nothing that can be said in words is worth saying.

Wisdom can be learned. But it cannot be taught.

There is nothing to be learnt from a Professor, which is not to be met with in Books.

Any “knowledge” incapable of being revised with advances in data and human thinking does not deserve the name of knowledge.

We all love to instruct, though we can teach only what is not worth knowing.