As applied to the disciples of John, it is an illustration that taught them to let go of the old forms of religion taught by John the Baptist, which belonged to the old dispensation. Some of them may have had true faith, but they were still living in the manner of their master, whose life was necessarily consistent with his message – a call to repentance – and who encouraged the people to prepare for the one coming after him.
The old garment also represents the old nature. The subject is offensive so we need to go at it gently. There are aspects that are hard to take, and the preacher does not need to become a sledgehammer. The Lord uses an illustration, partly to provide lines of observation, but partly also to blunt the edge, so those who use this passage must not work against his intention. Instead of saying, ‘You are evil’, we say, ‘We are like this because of the sorry state of our souls.’ The offence of the gospel is unavoidable, but we are aiming to instruct, not to offend.
The old garment is only worthy to be discarded. It is threadbare – we have no strength of character as unconverted people. It is insufficient to keep us warm – we have no joy. That garment is stained, and the stains will not wash out no matter how many times you try. We cannot remove our own guilt or change our own hearts. Amazingly, another garment is available. (Luke’s illustration adds this further element and speaks of the patch being cut out of a whole new garment.) Why should we be so anxious to ruin a new garment by cutting a part out of it? The result will be that both garments will be ruined. As we try to communicate these things to the lost we can be sympathetic. It is typical of the Lord to have an extraordinary element in his illustration. Why not change to the new garment? Repentance and faith, are so freely available. Yet here are those who are trying to take only a small piece of the new life. We have a false view of ourselves. We sin and minimise it, excuse it away. The little good we do we boost too much in our minds. We can’t see ourselves. This was a stunning shock to me. When I saw what I was and then I said how can God have anything to do with me?
He who possesses only the old garment cannot see what is the matter with it. Although to others it is worn out, threadbare, he wants to carry on wearing it – our old natures are threadbare especially in sight of God. He cannot see the superiority of the new – the hope of heaven, the happiness of walking with God. Some are like this – they have paid a lot of money for old garment thirty years ago, or they made it themselves and are still proud of it, but it needs to be changed now; they need to be shown the superiority of Christian experience. ‘Only a patch is needed’, they think. ‘I’ve got my faults.’ They don’t understand the holiness of God. You cannot take a bit of Christianity and leave the rest. Honesty and doesn’t go with greed; love cannot exist alongside cruelty. We need a radical change. Conversion is not a patch up but a complete change. This new garment will never wear out.