Meditation and Affirmation are powerful training tools for personal growth, self-development, and self-defense. I would go as far as to say that mastery in any form cannot be attained without incorporating this practice.
Meditation teaches focus, discipline, mindfulness, and the power that visualization has to transform mind, body, and spirit. Affirmation works from the outside to program the way our mind thinks and reacts.
The two practices work cohesively to improve how we think, feel, react, and behave.