John 15:7

Then He showeth what it is to "abide," and saith, "If My words abide in you." Seest thou that with reason I said above, that He seeketh the proof by works? For when He had said, "Whatsoever ye shall ask I will do it," He added, "If ye love Me, ye will keep My commandments." And here, "If ye abide in Me, and My words abide in you." "Ye shall ask what ye will, and it shall be done unto you." This He said to show that they who plotted against Him should be burnt up, but that they should bear fruit.

(Tract. lxxxi. 4) For then may His words be said to abide in us, when we do what He has commanded, and love what He has promised. But when His words abide in the memory, and are not found in the life, the branch is not accounted to be in the vine, because it derives no life from its root. So far as we abide in the Saviour we cannot will any thing that is foreign to our salvation. We have one will, in so far as we are in Christ, another, in so far as we are in this world. And by reason of our abode in this world, it sometimes happens that we ask for that which is not expedient, through ignorance. But never, if we abide in Christ, will He grant it us, Who does not grant except what is expedient for us. And here we are directed to the prayer, Our Father. Let us adhere to the words and the meaning of this prayer in our petitions, and whatever we ask will be done for us.

"If ye abide in me," He says, "and my words abide in you, ye shall ask what ye will, and it shall be done unto you." For abiding thus in Christ, is there aught they can wish but what will be agreeable to Christ? So abiding in the Saviour, can they wish anything that is inconsistent with salvation? Some things, indeed, we wish because we are in Christ, and other things we desire because still in this world. For at times, in connection with this our present abode, we are inwardly prompted to ask what we know not it would be inexpedient for us to receive. But God forbid that such should be given us if we abide in Christ, who, when we ask, only does what will be for our advantage. Abiding, therefore, ourselves in Him, when His words abide in us we shall ask what we will, and it shall be done unto us. For if we ask, and the doing follows not, what we ask is not connected with our abiding in Him, nor with His words which abide in us, but with that craving and infirmity of the flesh which are not in Him, and have not His words abiding in them. For to His words, at all events, belongs that prayer which He taught, and in which we say, "Our Father, who art in heaven." Let us only not fall away from the words and meaning of this prayer in our petitions, and whatever we ask, it shall be done unto us. For then only may His words be said to abide in us, when we do what He has commanded us, and love what He has promised. But when His words abide only in the memory, and have no place in the life, the branch is not to be accounted as in the vine, because it draws not its life from the root. It is to this distinction that the word of Scripture has respect, "and to those that remember His commandments to do them." For many retain them in their memory only to treat them with contempt, or even to mock at and assail them. It is not in such as have only some kind of contact, but no connection, that the words of Christ abide; and to them, therefore, they will not be a blessing, but a testimony against them; and because they are present in them without abiding in them, they are held fast by them for the very purpose of being judged according to them at last.