A cup is useful only when it is empty; and a mind that is filled with beliefs, with dogmas, with assertions, with quotations is really an uncreative mind.
Buddha called himself 'The Enlightened One' and Jesus called himself 'The Son of God'. To me the term 'World-Teacher' is of as little importance as 'The Son of God' or 'The Enlightened One'.
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.