Martin actually answers an interview question

Aha. So, being asked about morbidity is some sort of journalistic trap, but questions about religion are apparently fine:

Asked in an interview with BBC 6Music, where they had come from, Martin replied: “Probably because I think you talk about things you saw a lot when you were a kid so we grew up with school assemblies, being constantly told about that kinda stuff - so it’s bound to come out.”

Y'know, some people just don't believe there's any deep philosophy behind Coldplay records and that the lyrics are just stuff that fills up the bits under the music and gives Chris Martin something to do while the band are playing.