Maxwell Maltz said this quote

You make mistakes, mistakes don't make you

~ Maxwell Maltz

A human being always acts and feels and performs in accordance with what he imagines to be true about himself and his environment...For imagination sets the goal ‘picture’ which our automatic mechanism works on. We act, or fail to act, not because of ‘will,’ as is so commonly believed, but because of imagination.

~ Maxwell Maltz

Happiness is a mental habit, a mental attitude, and if it is not learned and practiced in the present it is never experienced. It cannot be made contingent upon solving some external problem. When one problem is solved, another appears to take its place. Life is a series of problems. If you are to be happy at all, you must be happy - period! Not happy because of.

~ Maxwell Maltz

Our errors, mistakes, failures, and sometimes even our humiliations, were necessary steps in the learning process. However, they were meant to be means to an end - and not an end in themselves. When they have served their purpose, they should be forgotten. If we consciously dwell on the error, or consciously feel guilty about the error and keep berating ourselves because of it, then - unwittingly - the error or failure itself becomes the goal that is consciously held in imagination and memory.

~ Maxwell Maltz