Nothing can be taught to the mind which is not already concealed as potential knowledge in the unfolding soul of the creature. So also all perfection of which the outer man is capable, is only a realising of the eternal perfection of the Spirit within him. We know the Divine and become the Divine, because we are That already in our secret nature. All teaching is a revealing, all becoming is an unfolding. Self-attainment is the secret; self-knowledge and an increasing consciousness are the means and the process.
Ref: The Synthesis of Yoga