Language is power. Repetition is habituation. Habituation is anchoring, is programming, is the sowing of loaded impressions and ideas: propaganda, advertising, marketing, announcement, brainwashing, disinformation, doctrine, evangelism, hype, implantation, inculcation, indoctrination, newspeak, promotion, promulgation, proselytism, publication, publicity.
Ego is self. Self is thought. Thought is language. Language is idea. Idea is power. Ego is power. Expand your language to expand your self. Ego is self-efficacy, self-esteem, belief in your-self: these dictate your charisma, your enthusiasm, your ability to speak, your ability to persuade, to leverage the minds of others.
It is not enough to possess a vocabulary; you must possess a critical vocabulary, a vocabulary that is capable of providing self-justification, capable of asking questions of why? and providing extensive answers.