In fact, his mother got that one from the bible, which says, do not let the sun go down on your anger. More about that in a minute, but first I want us to notice that this series of disjointed beliefs is pretty typical of the way that people around us think. They think that truth is just a matter of what you choose. Everybody chooses their own set of things to believe in. And it doesn't necessarily matter if some of them contradict each other.
Truth is relative.
Nobody's right or wrong, and we decide for ourselves who we are and how we will behave. But as Christians we have to opt out of this kind of self-centred thinking that says the universe revolves around our personal choices. It's a very self-centred world. We saw last week that following Christ involves a loving, forgiving community of God's people who love others as they love themselves. Savage Garden seems to be saying that the only person's love you can really rely on is your own.