Hmmmm. This appears to me to be an appeal to authority.^Ha! Good one!
In fact, all the religious/spiritual traditions that I am familiar with, state that claiming to be advanced is a sure sign that one is not advanced.
I've always disliked the accepted set of logical fallacies, however, simply due to the fact that by accepting them as canon, one is, in essence, already appealing to authority in the very act of invoking them. Quite the conundrum, really. Perhaps even an example of paradox, without really thinking about it.
As to the question at hand, the answer is, simply, me. This is of course relying solely upon my own definition of "spirituality" as it would appear that no one has put one forward as yet.
I have yet to meet anyone who knows as much about humanity itself than myself. This is a simple, albeit subjective, statement of fact. For those who have already put forward self-effacement and humility as an indicator of elightenment, it should also be an indicator that I emphatically reject the premises upon which you base your judgement.
Humanity, in order to "advance", has always relied upon both catalyst and protagonist. The absence of either, or both, tends to result in little more than stagnation. Conflict, and the subsequent dominance of one thing over another, lies at the heart of the most basic levels of life on earth.
Humility, espoused as a concept or as a reality, achieves nothing other than to give its advocator a reason to accept ones own existence. It serves as justification. It is a given in my view that the majority ride on the coattails of a very few who give us, by dint of their own superiority, in one form or another, the ability to continue existing in the manner in which we deem fit.
It relies entirely upon the largesse of those few who were not humble.
If anyone, at this point, decides to throw Ghandi at me by way of example in opposition I will state, in advance, here and now, that he was not humble.
Does anyone, really, not see the multiple levels upon which the cartoon shown above was not humorous?
Really?
The concept of God, in one form or another, lies at the heart of all philosophical meaning.
Is it any wonder, then, that the concept exists to begin with. Or that we so desperately desire to believe.
Because without it, and without any real understanding of what death actually is without it, we remove the veneer through which we perceive reality.
You really, really, do not want to do that.