Romans 8:27

Romans 8:27. And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God.

That is, when the mind lies still, and God the Holy Spirit writes his will upon it, and also writes God’s will. Hence such prayers are sure to be effectual, for they are but the shadow of God’s secret purpose falling upon the soul as a kind of prelude to the coming fulfillment of that purpose. Saints’ prayers are prophets of God’s mercies. We are sure of it; we have no doubt whatever; we know it by experience, as well as by revelation.