But let a man know that there are things to be known, of which he is ignorant, and it is so much carved out of his domain of universal knowledge.

Every addition to true knowledge is an addition to human power.

To pity distress is but human; to relieve it is Godlike.

Education alone can conduct us to that enjoyment which is, at once, best in quality and infinite in quantity.

I speak from ignorance. Who once learned much, but speaks from ignorance now.

There has been an alarming increase in the number of things I know nothing about.

It is better to ask some of the questions than to know all the answers.