This song is about what happens when you have tried to live by society's rules and be the 'model citizen' but you never get what you want from life and get into a period of depression. Most of society is designed by those in power to keep you down amongst the 'drone' of other people who don't dream and just merely exist and float through life without any challenging goals. So you become disillusioned and 'trapped in your own head' and your own, little world where you think no-one will ever understand you and what you were trying to achieve as a large, personal goal. After all, most people tend to be cynical when you have a big plan and try to pull you down to make themselves feel better about their own lack of motivation in life. So you're stuck in a world of rejects with no passion. Part of depression is feeling like you're isolated. If you've never had proper, clinical depression before then it's kind of hard to imagine that mindset, but that's what it feels like and you're mind makes up absolutely crazy reasons to not take action and get out of your slump, so you spiral off into your own personal space and want to hide from the world. The way out is to not give up and to re-frame all negative thoughts in a positive light!