“Human beings act, feel, and perform in accordance with what they imagine to be true about themselves and their environment. What you imagine to be true becomes, in fact, true. Hold a given picture of yourself long and steadily enough in your mind’s eye and you will become that picture. Picture yourself vividly as defeated and that alone will make victory impossible. Picture yourself vividly as winning and that alone will contribute immeasurably to success.”
Thinkertoys by Michael Michalko