Only intuition can protect you from the most dangerous individual of all, the articulate incompetent.

I cannot function effectively when I’m in a state of ignorance.

Men are born ignorant, not stupid; they are made stupid by education.

Ignorance is a blank sheet on which we may write; but error is a scribbled one from which we must first erase.

It is almost as difficult to make a man unlearn his errors as his knowledge.

I beseech you, in the bowels of Christ, think it possible you may be mistaken.

Sometimes I go out and hear people talk about irrelevant things and then I tell myself this is why I don’t go out.

Oh what men dare do! what men may do! what men daily do, not knowing what they do!

In theory it is easy to convince an ignorant person; in actual life, men not only object to offer themselves to be convinced, but hate the man who has convinced them.

This world which consists of friends, enemies and neutrals, which affects you with pleasure and pain, is only a creation of your mind which is a product of ignorance.