Human potential is the same for all. Your feeling, 'I am of no value', is wrong. Absolutely wrong. You are deceiving yourself. We all have the power of thought — so what are you lacking? If you have will-power , then you can do anything. It is usually said that you are your own master.
The maker of a sentence launches out into the infinite and builds a road into Chaos and old Night, and is followed by those who hear him with something of wild, creative delight.
Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.