We know not the matter of the things for which we should pray, neither the object to whom we pray, nor the medium by or through whom we pray; none of these things know we, but by the help and assistance of the Spirit.
The people of the Lord in humility are to lay themselves and their prayers, and all that they have, at the foot of their God, to be disposed of by him as he in his heavenly wisdom seeth best. Yet not doubting but God will answer the desire of his people that way that shall be most for their advantage and his glory. When the saints therefore do pray with submission to the will of God, it doth not argue that they are to doubt or question God's love and kindness to them. But because they at all times are not so wise, but that sometimes Satan may get that advantage of them, as to tempt them to pray for that which, if they had it, would neither prove to God's glory nor his people's good.
Zeal without knowledge is like a mettled horse without eyes, or like a sword in a madman's hand; and there is no knowledge where there is not the word: for if they reject the word of the Lord, and act not by that, 'What wisdom is in them?' saith the prophet (Jer 8:9; Isa 8:20).
If you do not put a difference between justification wrought by the Man Christ without, and sanctification wrought by the Spirit of Christ within, you are not able to divide the word aright; but contrariwise, you corrupt the word of God.