I read about a military commander who explained to his men that in every battle there is a simple formula to victory. You have two sides and both are straining. Both want to give up. Yet, whoever doesn’t give up wins.
That’s life (but without the bullets flying around.)
Self-doubt, distraction, hedonism, laziness, procrastination, and vice all are pushing against you. If you want to achieve your goals, you need to push back and never give up. When you give up, you lose.