Why not totally commit to something you believe in and are passionate about allowing you to reach success instead of pretending to try by not giving your full attention, commitment or energy and then failing?
If you commit, you will succeed, if you hold back your total being, you will lose. All in or nothing. Nothing left on the table, no Plan B, no bailout plan and no backup. You are in and win or you dabble and die.
This includes everything, from being in a relationship to being the best coach in the world. Never get into anything without committing to being the best there ever was. Even if you stumble and falter at first, you are trying at a higher level than most will ever even dream about in their own lives.
When we fail to commit, we set up failure in advance as a built in excuse to avoid success. Failure to commit your soul to anything guarantees you will fail, but then you can tell everyone you tried and it wasn't you fault that it didn't work. Lack of commitment is a pass that covers your ass when you fail: you looked good trying, but it really didn't work so no big deal.
This is why so many people try, yet so few succeed in anything. Failure to commit and failing is so much easier than going all in with every single ounce of your talent and being, and that is just too much for too many people. All in or out? The only way to live.