The word Enthusiasm originates from the Greek word Enthios + yasm “the god within” when you have enthusiasm/passion for something. In side of you, that is your higher conscience speaking to you saying “don’t get to the end of your life.
To put it in a simple way, when you are down and out, and you are at the very bottom, all you have is to look up as you are already at the bottom. There isn’t anything further down and below.
When I looked up to the journey of really successful people, their learning on how they survived while they’re down and made it to the top, it’s clearly visible that they immediately took the control of the situation and worked towards the next step, the next step and the next step.” Keep going, look up, and keep going.