You know better than I that in a Republic talent is always suspect. A man attains an elevated position only when his mediocrity prevents him from being a threat to others. And for this reason a democracy is never governed by the most competent, but rather by those whose insignificance will not jeopardize anyone else's self-esteem.
We all place ourselves at various levels, and we are constantly falling from these heights. It is the falls we are ashamed of. Self-esteem is the cause of our shame, of our fall. It is this self-esteem that must be understood, and not the fall.
If we choose an external marker as the measure of our inner worth, whether it is the amount of money we make, or others' opinion of us, or the success of some project we're involved in, sooner or later we're bound to be battered by life's inevitable changes. After all, money comes and goes, and thus is an unstable source of self-esteem, an unreliable foundation upon which to build our identity.
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.