Full Idea
God exists, but he is for us a tabula rasa, an empty being, a mere idea; God, as we conceive and think of him, is our ego, our mind, and our essence.
Clarification
A 'tabula rasa' is a blank page
Gist of Idea
God is for us a mere empty idea, which we fill with our own ego and essence
Source
Ludwig Feuerbach (Principles of Philosophy of the Future [1843], §17)
Book Reference
Feuerbach,Ludwig: 'Principles of the Philosophy of the Future', ed/tr. Vogel,M [Hackett 1986], p.29
A Reaction
He accepted God's existence because of the Ontological Argument. This is a little stronger than Hume's view (Idea 2185), because Hume seems to be talking about imagining God, but Feuerbach says this is our understanding of God.
Related Idea
Idea 2185 The idea of an infinite, intelligent, wise and good God arises from augmenting the best qualities of our own minds [Hume]