From The Metaphysical Center of New Jersey:
Esoteric means "hidden" or "inner," for these ancient teachings have been hidden or secret for many ages, taught only to selected initiates who have proven their readiness to receive them. Now that we are in the dawn of a new age, marked by a general expansion of consciousness, the teachings are being given openly to all who are interested. According to an ancient esoteric truth, "When the student is ready, the teacher appears."
Metaphysics has two branches, the esoteric philosophy and the study of psychic phenomena.