In short all the things that go into building your individual sense of self or ego. The word vasana is usually translated as mental conditioning or subtle tendencies . When the yogin connects with this contractive motion, he is effortlessly propelled to the original, unbounded consciousness of God. It is this contraction and expansion that produces the vibration known as the spanda . Even psychic powers are not yoga .
Yoga is awareness, transformation of the human consciousness into divine consciousness.
One who practices yoga .