। ॥ ६६ ॥
In plain words
Trace the mind back to its own source this way, and it settles, deep and still, inward. No longer racing outward — why wouldn't it then arrive, on its own, at exactly what it is?
Close to the Sanskrit
Thus, the mind, inquiring into its own cause, would become well-steadied within; then, not rising outward, why would it not itself go to [realize] its own Self-nature?