“If half a century of life has taught me anything, it is this; No one can bring us peace but ourselves.” Dale Carnegie Words of Science and Wisdom, Education and Training Words, Words of the Day, Quotes About Life, Words About People Motivational Coaching with Dr. Tayfun Topaloğlu 👉 Apply “If half a century of life has taught me anything, it is this; No one can bring us peace but ourselves.” Dale Carnegie