metaxu ~= "in between"

by the delusions

It is delusion itself — in the form of wisdom derived from delusion — that actually destroys the delusions.
Similarly it is the blissful experience of emptiness induced by sexual desire that dissolves the force of sexual impulses.
This is analogous to the life of wood-born insects: they consume the very wood from which they are born.
Such utilization of the path to enlightenment is a unique feature of tantra.