But if a man is in earnest in wishing to get at the depths of his own heart, to expel the evil, to purify the good, and to gain power over himself, so as to do as well as know the Truth, what is the difficulty?—a matter of time indeed, but not of uncertainty is the recovery of such a man. So simple is the rule which he must follow, and so trite, that at first he will be surprised to hear it. God does great things by plain methods; and men start from them through pride, because they are plain. This was the conduct of Naaman the Syrian. Christ says, "Watch and pray;" herein lies our cure. To watch and to pray are surely in our power, and by these means we are certain of getting strength. You feel your weakness; you fear to be overcome by temptation: then keep out of the way of it. This is watching. Avoid society which is likely to mislead you; flee from the very shadow of evil; you cannot be too careful; better be a little too strict than a little too easy,—it is the safer side. Abstain from reading books which are dangerous to you. Turn from bad thoughts when they arise, set about some business, begin conversing with some friend, or say to yourself the Lord's Prayer reverently. When you are urged by temptation, whether it be by the threats of the world, false shame, self-interest, provoking conduct on the part of another, or the world's sinful pleasures, urged to be cowardly, or covetous, or unforgiving, or sensual, shut your eyes and think of Christ's precious blood-shedding. Do not dare to say you cannot help sinning; a little attention to these points will go far (through God's grace) to keep you in the right way. And again, pray as well as watch. You must know that you can do nothing of yourself; your past experience has taught you this; therefore look to God for the will and the power; ask Him earnestly in His Son's name; seek His holy ordinances. Is not this in your power? Have you not power at least over the limbs of your body, so as to attend the means of grace constantly? Have you literally not the power to come hither; to observe the Fasts and Festivals of the Church; to come to His Holy Altar and receive the Bread of Life? Get yourself, at least, to do this; to put out the hand, to take His gracious Body and Blood; this is no arduous work;—and you say you really wish to gain the blessings He offers. What would you have more than a free gift, vouchsafed "without money and without price?" So, make no more excuses; murmur not about your own bad heart, your knowing and resolving, and not doing. Here is your remedy.
-John Henry Newman
Parochial and Plain Sermons, Volume 1, Sermon 3:
"Knowledge of God's Will Without Obedience (1834)