In order for ego to function vigorously, conflict is necessary. This, of course, requires enemies. (Super-inflated egos curate actual lists of enemies.) When Jesus said, “Forgive your enemies,” he meant, Have no enemies.
Jesus said it was a disaster-in-the-making to put new wine into old wineskins. Wine in the New Testament is a metaphor for life. By co-mingling new and old, we produce a negative result. The new man is an old man relinquished, not an old man added to.