Buddhi Yoga

Spiritual intelligence lifts and saves the soul. Lusty intelligence drowns the soul into deep ignorance. Intelligence is next door neighbor to the soul. If he is healthy and flourishing, soul will also flourish. But if it is infected with lust, independent ananda, then the soul will suffer as its freewill will be misguided to act wrongly and leads one to undesirable and unconstitutional locations.

Primary lusty intelligence is the idea that you can enjoy without Krishna. Illusion starts right then and there. When secondary illusion begins thru a concrete false self, pure self cannot actually enjoy without Krishna's pleasure connection. The first illusion is of a false self who can stand as an independent alternate self to us but borrow the pure self's free will. Thus illusion expands.  Defuse sat out of this primary false ego, 'I am made of matter’. Following that, there are several secondary false egos. Biggest Maya is material individuality or specificness of personality created by unique material energy. But it is only a consequent to the decision that was taken by the pure self to act independently forgetting the Lord in my heart.

Spiritual intelligence means feeling the purpose of the Lord for entire  existence. By contemplation, this buddhi has to deepen into an existential feeling. 'I exist for this purpose'.  Everything is feeling. Purpose feeling comes from sat energy. You exist where you feel a purpose. So feel where you wish to exist. That is called existential feeling.

Paste existential feeling (purpose) on the Truth. The free will should be used to go deep into meditation repeatedly to do this pasting of existential feeling. This is sat skill. It cannot be done by left brain. Sat feeling has to flow with a purpose of Truth of the sastric facts and absolute functional truths. This is indeed is buddhi yoga. Who am I? Who is Supersoul? What is the purpose of existence? Definitely not me. I am part and parcel of Krishna. This is contemplation of sat.