Humbleness is knowledge before being a virtue.
It is a lucid virtue, which makes the virtues discreet, as if unnoticed, almost denied. Recognising its lack is the first step toward it.
As a virtue, it is the authenticity of being only ourselves. Not self-contempt, nor ignorance of what we are, but the knowledge, or recognition, of all that we are not.
Humbleness is not to be confused with a bad conscience, with remorse or shame, for these suppose that we could have done differently and better.
It seems to be a contradictory virtue, which could only be justified by its absence.
Humbleness leads to love and certainly, all true love presupposes it.