The word psychology means 'science of the soul' (the Greek psyche ψυχή means soul, not mind). Most cultures admitting the notion of soul (especially ancient/primitive ones) describe soul as a pool or lake in the lower belly. Indeed the word soul comes from the Old English sāwol which originally meant 'from the sea'. So the instruction: Mind in Dantien doesn't mean put your thinking mind in the belly but rather Connect with your Soul.
The student must work sufficient to internalize the teaching – make it her own – or forever remain dependent. And remember: dependent is depressed.
Swimming the stream of consciousness.
When we think with words then the mind stays in the head but when we think in images then the mind fills the whole body. And when we think deep deep images called archetypes then the mind fills the soul.
Most of what the teacher says you would find out for yourself if you did a tap of work. Then, and only then, it has power.
Surfing the wave of awareness.