Egotheism is deification of the self, or the view that the idea of God is nothing more than a conception of the self. The latter position presupposes the impossibility of divine revelation. As such, it is a denial of the validity of faith and most theistic traditions, except for deism.
Satanism teaches self-deification. A version of egotheism exists in the pagan cult of Antinous, where it is known as homotheosis.