What is the whole point of bringing someone to salvation?
The whole point of bringing someone to salvation is to see a complete change in lifestyle and desire, where former loves become hated and former hatreds become loved. It is to walk after the Spirit rather than after the flesh, showing the reality of the salvation.
Les explains that when he has had the opportunity of bringing someone to a knowledge of salvation, he likes to see a complete change in lifestyle and a change in desire, because that is the whole point of the thing. This change mirrors what Paul says: the things he once hated he now loves, and the things he once loved he now hates. The saved person walks not after the flesh but after the Spirit, minding the things of the Spirit, while the lost person, still in spiritual darkness and blinded by the god of this world, minds the things of the flesh or old Adam. The whole point, then, is the evident transformation from old Adam’s appetites to the Spirit’s desires.