I think this is a song about somebody who is unhappy, and wants more in their life. To do this, though, he would have to expand as a person. He must accept their shortcomings, face his fears, and leave his comfort zone to do this. He is apprehensive of this, so he tries to convince himself that he really is happy with what he has. He's struggling between the lie he's set up for himself, the unhappiness of his current life, and the difficulty of taking action to improve his life.
I think this is a song about somebody who is unhappy, and wants more in their life. To do this, though, he would have to expand as a person. He must accept their shortcomings, face his fears, and leave his comfort zone to do this. He is apprehensive of this, so he tries to convince himself that he really is happy with what he has. He's struggling between the lie he's set up for himself, the unhappiness of his current life, and the difficulty of taking action to improve his life.