Psalms 102:18

4. “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. …

22. “And His righteousness upon children’s children” ( ver. 18 ). He speaketh of reward, “upon children’s children.” How many servants of God are there who have not children, how much less children’s children? But He calleth our works our children; the reward of works, our “children’s children.” “Even upon such as keep His covenant.” Let men beware that all may not conceive what is here said to belong to themselves: let them choose, while they have the choice. “And keep in memory His commandments to do them.” Thou wast already disposed to flatter thyself, and perhaps to recite to me the Psalter, which I have not by heart, or from memory to say over the whole Law. Clearly thou art better in point of memory than I, better than any righteous man who doth not know the Law word for word: but see that thou keep the commandments. But how shouldest thou keep them? Not by memory, but by life. …