And I don't know what to make of the rest of your post. What do you mean by the self? It seems to mean different things throughout the post (or to be too broad to mean anything). You say that the self wants most to be concrete, that self-confidence is the ability to reveal the self completely, and that the will is the concrete of the self (in a man with self-confidence). So, really, self-confidence is just the ability to reveal the will, for the man with self-confidence reveals the self completely, and if both the self wants most to be concrete and the will is the concrete of the self, the self, whatever it does mean, falls by the wayside as a mere intermediary to the will. So when you go on to say that the overwhelming will can effect a victory of the self, you seem to have lost track of your thought. In any case, your meaning is near impenetrable.
I liked the anecdote I had to look up fastidiousness and perspicuity lol.
The self (to me) is the mind but it is the mind's view of itself. Consciousness or soul could work. But it is the relation of the mind to its self, I think of thinking about your own thoughts, instead of just acting upon the thoughts with immediacy as normies are want to do (like the animals they are). The self is the innermost part of the soul (to me) where the mind scoops up from its sea of thoughts ideas that it holds to that become parts of the self, images, sounds, beliefs, etc all make up the self (to me). I am speaking about my self (because that is all I can go off of) when I say that the self wants to be "real" in that it feels unstable being a compilation of fragments, but when using language a part of the patchwork is made whole by speech (God spoke the world into being), and then if it is affirmed by others, the self feels assurance that can only be given from something out side it self. A reason God is met when alone, because as the creator of the soul he is in relation to the self and gives the ultimate assurance, no man can give INTERNAL assurance to the self, only God can give this amazing blessing, also know as faith.
Self-confidence comes from willing to expose the self to danger. Will is the self overcoming its self to take action and use the body (speech) to expose its self. We do not say an animal wills, because animals simply act. They have no will. To will one must have a self. But self-confidence is hard because as I said the self is fearful of exposing itself because what the self has built into a patchwork is unstable being only referenced from its self (the mind), but it is better than the chaos of an animal / passionate thought - instant action state that it came out of. But if the self is exposed and is not assured but attacked, it is returned to an animal like state (emotion / passion) because it questions its self (proved from arguments with other minds). Back to will. We can will because we have a self, but to will is hard because the self questions itself, how can you will or act when you internally question every action (of the self)? And so self-confidence requires an overwhelming will the more introspective and self-conscious someone is (the more like God someone is). So will is not revealed by self-confidence, self confidence is gained by using (or developing) the will to the point that it is able to over come self doubt, thus strengthening the self in the process. Will is the tool, the self is the user of the tool.
A self without an overwhelming will is common to many, because as the self expands itself doubts increase about itself and the consequences of actions etc (anyone who has higher consciousness will relate), the will does not develop in line with the self, and so in most it is underdeveloped, and leads to impotency (neets, recluses, incels, monks, "weridos"), Christianity if improperly understood can exacerbate this "thy will be done", (but you have to will for His will to be done, you see another paradox of faith) etc. The will must be developed by the self and as the self develops the will it is made more secure.
Sorry, I am trying to present my ideas in a coherent way but it is hard to do. But if I am provoking thought I am glad.
(i dont know if I should put "it self" or "its self" so i used both lol and self-conscious is not ment negatively here as normies use it in the jewish pyschobabble manner, self-conciousness is GOOD the more of it you have to more human you are (like God you are) the less the more like a beast you are (norm scum))