I'm not sure if I agree with this. Certainly, repeating self-help mantras and affirmations are not going to miraculously transform your life overnight. However, they can be put to good use when you are doing other things, over a long period of time, to re-Program yourself. I.e., they can be helpful re-Minders and re-in-forcers, but they are not the main course.

Don't underestimate the power of neuro-plasticity.