Anyone who has never made a mistake has never tried anything new.
I came to America because of the great, great freedom which I heard existed in this country. I made a mistake in selecting America as a land of freedom, a mistake I cannot repair in the balance of my lifetime.
The only real mistake is the one from which we learn nothing.
Reason and free inquiry are the only effectual agents against error.
An expert is a person who has made all the mistakes that can be made in a very narrow field.