God is like that. He's all around every one of us. His existence is more real than our own. Completely obvious. And yet we don't believe in the stuff that allows us not to believe in it if that's our inclination.
It is therefore plain, that nothing can be more evident to any one that is capable of the least reflexion, than the existence of God, or a spirit who is intimately present to our minds, producing in them all that variety or ideas or sensations, which continually affect us, on whom we have an absolute and entire dependence, in short, `in whom we live, and move, and have our being’ [Acts 17:28]. That the discovery of this great truth which lies so near and obvious to the mind, should be attained to by the reason of so very few, is a sad instance of the stupidity and inattention of men who, though they are surrounded with such clear manifestations of the Deity, are yet so little affected by them, that they seem as it were blinded with excess of light.
Bishop Berkeley, A Treatise Concerning the Principles of Human Knowledge, Principle # 149.