Romans 8:27

Romans 8:27. And he that searcheth the hearts knoweth what is the mind of the Spirit,

When you do not know your own mind, God knows the mind of the Spirit, and that is the very essence of prayer. He "knoweth what is the mind of the Spirit," -

Romans 8:27. Because he maketh intercession for (or, in) the saints according to the will of God.

Whatever the spirit of God prompts us to pray for, is according to the mind of God, for it is not possible that the Holy Spirit should ever be otherwise than in perfect accord with the Divine Father. The eternal degrees, if we could read them, would convey to us the same truth as the impulses of the Spirit in our heart. And this is the true exploration of prayer, - that what God intends to do, his spirit leads his people to ask him to do; and thus there is no conflict between the eternal predestination of God and the earnest entreaties of his people. They are, in fact, the outcome of that very predestination.