Moon’s image here is striking: the mind has a gate, and the life of faith is learning when that gate is open and how to align it with the gate of heaven.
This gives spiritual formation a craft dimension. Rather than treating prayer as a flat, identical action every time, the chapter suggests attentiveness to timing, inward condition, and responsiveness.
It also keeps spirituality from becoming vague. The goal is not private intensity for its own sake, but a more accurate response to God.