Many bodybuilders sell ...

Many bodybuilders sell themselves short. Erroneously attributing their lack of satisfactory progress to a poverty of the requisite genetic traits, instead of to their irrational training and dietary practices, they give up training. Don't make the same mistake
 Mike Mentzer

Quotes from the same author

It is only within the context of having properly developed your mind that you will be able to truly enjoy the achievement of your material values, including that of a more muscular body.
 Mike Mentzer
Man's proper stature is not one of mediocrity, failure, frustration, or defeat, but one of achievement, strength, and nobility. In short, man can and ought to be a hero.
 Mike Mentzer