Natural ability without education has more often raised a man to glory and virtue than education without natural ability.Marcus Aurelius
Don't measure yourself by what you have accomplished, but by what you should have accomplished with your ability.John Wooden
Natural abilities are like natural plants, that need pruning by study; and studies themselves do give forth directions too much at large, except they be bounded in by experience.Francis Bacon
I know of no more encouraging fact than the unquestionable ability of man to elevate his life by conscious endeavor.Henry David Thoreau
Cowardice... is almost always simply a lack of ability to suspend functioning of the imagination.Ernest Hemingway
Ability is what you're capable of doing. Motivation determines what you do. Attitude determines how well you do it.Lou Holtz