Abstract
The essay develops a disjunctive account of perception, showing that it needs to be renamed 'self-conscious power account'. For it is by reference to a self-conscious power of sensory knowledge that, on the one hand, the unity of perception and illusion and, on the other hand, the priority of perception over illusion, specifically, its priority in knowledge, is understood. The concept of a self-conscious power thus transpires as lying at the basis of a sound epistemology and response to sceptical arguments such as the argument from illusion