I learned this a long time ago from one of my mentors Mr. Jim Rohn
The biggest barrier that most people have to overcome is fear.
Fear of rejection. Fear of making decisions. Fear of change. Fear of confrontation. Fear of loss. Fear of failure. And of course the big one – fear of success! It is this fear (and all of its cousins like worry, anxiety, and self-doubt) that paralyzes you, and keeps you from succeeding.