There are many things, which you “fire” once will never come back or stop from making the damage. Words, actions, orders, flight takeoff just about anything that has “no point of return”.
Missile once launched cannot be put back onto the launch pad. Words once spoken cannot be put back into mouth. Similarly, many actions including deciding & passing the “point of return” can never be undone. Once you nearing the end of the runway, you must press “Take Off” else there is no point of return and you can’t risk stopping the plane in the end of the runway.
Effective self discipline and management involves identifying the “points of return”. Carefully trespassing them, so you don’t cry when you cross them. Be careful when you press “Fire” next time.