Lyric discussion by Loquacity 

Mr Brightside isn't about someone cheating on you. It's about the insecurity and jealousy that can rise up and ruin a relationship, breaking down the trust. Think about it: "and it's all in my head".

And in the chorus we have "turning saints into the sea". Women suspected of witchcraft were often thrown into water, and if they drowned were they innocent, if they survived they were a witch, and were to be killed anyway. The exact same thing's going on here, metaphorically. Even if the partner was completely innocent - a "saint", so to speak, the relationship is still being destroyed by the jealousy and insecurity.

"But it's just the price I pay" - of course, a ruined relationship is going to be the price you pay for letting your unfounded jealousy be "taking control". Really, Brandon's encouraging people in the same situation to "open up [their] eager eyes" - to see what's actually going on, to face everything instead of burying your head in the sand.

It's almost bordering on possessiveness though - "gotta gotta be down because I want it all" - there's a controlling side to (him) that wants to monitor (her), and because he can't, he starts inventing scenarios of her cheating on him to justify the resentment he's starting to feel because he doesn't OWN her. There's an insidious side to this relationship, so maybe that's what's meant by him "coming out of [his] cage" - he had this metaphorical cage imposed on him for a reason. Maybe there was a past relationship he ruined in a similar way, and he's tried to repress himself so the same doesn't happen, but he finds himself acting the same as before, and feels this is what he will always be - "destiny is calling me". And yet this optimism and hope that he can shake this insecurity off makes him believe he is "Mr Brightside", even though he knows "I never" can change.

Spot on interpretation. Only thing i would say is that this strikes similar chords with ultra rapid bipolar disorder, and borderline personality disorder. Half way through the chorus with the "destiny is calling me" represents, in my mind, a hypomanic shift to being incredibly positive, turning him into Mr. Brightside- the person that everyone knows him to be, even though sometimes he can be down on himself because of his jealousy issues. He says this is just the price he pays because when he is Mr Brightside, everything looks so great for him, why not be down...

@Loquacity dang.. are you a wizard?

@Loquacity It doesn't need much thought to come to your conclusion, bang on, mate.

An error occured.