From the point of view of self-motivation, it is very useful to find a creed, surrender to it and do its will. Destruction of the " I " will relieve from fear and doubts, will present pleasure and self-confidence. In General, find yourself some stone and become his slave, unquestioningly fulfilling the will of the owner. "Hey you, slave, stop eating, I order you to lose weight" - every day will tell you the owner, and you will happily and silently obey.
Strong desire creates impassability. A strong desire is like a great speed. Too much speed leads to the fact that the liquid becomes solid as a stone, and creates an impassability. If you slow down, you can walk through walls.