The doctrinal portion, the first half of this great epistle, ends with the wonderful ascription of praise to God in the closing verses of chapter 3, and then we come in chapter 4 to the practical portion of the epistle. Today, there is a tendency in Reformed circles to stress doctrine and perhaps not so much practice or behaviour, but the apostle lays out the doctrines and then comes to the actions and behaviour of believers.
There is a tendency sometimes even in the true church of Christ for preachers to be too authoritative and to sound as though it is their instruction and command, but we are at pains to reason and plead with the Lord’s people from Scripture and to show God’s reasoning.
Today, there is sometimes a tendency particularly in charismatic circles and so on to offer people a salvation which does not involve conversion really, though the word may be used. They make light of repentance so often, and the change that God brings about in conversion through the regenerating power of the Spirit is not emphasised. So people who were worldlings before they supposedly came to Christ are still worldlings afterwards, and their tastes are unchanged, but true conversion brings about a tremendous difference, a new creature.
Have you prayed to Christ and yielded your life to him and believed in him and trusted in Calvary? You have come to him, perhaps recently, but you are still not sure that you are his. You live in doubt. Yes, but how do I know I have been called? Well do you think you opened your own eyes? Do you think one day that proud heart of yours was softened by your own action and you felt your need of Christ, and you had the wisdom to turn to him from the world? No, of course you do not. Only God could do that; only God could bow your knee and make you earnest so that this is the most important thing in the world to you.