You mistakenly think we conceal what we worship since we have no temples or altars. Yet how can anyone make an image of God? Man himself is the image of God. How can anyone build a temple to Him, when the whole world can't contain Him? Even I, a mere human, travel far and wide. So how can anyone shut up the majesty of so great a Person within one small building? Isn't it better for Him to be dedicated in our minds and consecrated in our innermost hearts - rather than in a building?