Perhaps this doesn't mean very much to you. Belief in a God is not an essential part of the advaitins' doctrine. The non-dual doctrine implies the total absence of all duality. There is a distinction between monotheism and monism. The Master's official cult was monism, not monotheism.
Monotheism still has some sort of duality built into it.
So it is true to say, as did the monists, that God is not in an idol, or in a temple, in the sense that he is not confined to that form. BUT God, being omnipresent, is everywhere. For the mind has been so conditioned and it is not able to drop this conditioning. You seem to be trapped. So that in practice Gurudev had a rather interesting and remarkable theory which was reflected in his own daily life.