Lyric discussion by engsoccerfan 

The guy is falling in love with a girl. He loves her, and he's completely open with her, he trusts her fully and he can't imagine himself with anyone else. However, there's times when jealousy rears its ugly head, maybe because he's been hurt in the past by her or by someone else. He starts doubting his trust in her, because she can really hurt him since he's so open with her and loves her with his life. Then he realizes that its 'all in his head' and that he should stop assuming the worst with her, because she really loves him. He needs to 'open up his eager eyes, cause he's Mr. Brightside', he needs to start looking at good conclusions like he usually does, not just the worst possible outcomes.

Sad to say, there's times when I'm Mr. Brightside. I love the girl and I trust her, but there's times when jealousy rears its ugly head and she helps me beat it back down. I love you baby and thanks for always standing by me. =]

'Coming out of my cage' - Falling in love. 'Jealousy turning saints into the sea' - Paranoia coming in. 'Open up his eager eyes' - Stop looking at the worst possible outcomes and just have some faith.

An error occured.