On its surface, the Second Half of the Second Act will seem comparatively great for your character. Everything is going his way. He’s learning the value of implementing the Truth in his life. He sees the Truth in action and begins to value it—probably without even realizing it—more than he values the Thing He Wants. Out of habit as much as anything, he’s going to betray that Truth at the end of the Second Act, but he’s already too far gone on the Truth to ever abandon it. He’s already a changed person—and when he reaches the Third Plot Point, he’ll prove it.
