My take on this song is his life currently is shit, he is depressed, nothing is going his way. He has lost his hope, his faith, everything. Yet, he doesn't feel this is what life is. He knows there is more to it than what he has experienced and he wants to look on the bright side that there is more and that he needs to pick himself up and find this bright side of life. He wants to change his life so he can be "full again" not depressed and empty.
My take on this song is his life currently is shit, he is depressed, nothing is going his way. He has lost his hope, his faith, everything. Yet, he doesn't feel this is what life is. He knows there is more to it than what he has experienced and he wants to look on the bright side that there is more and that he needs to pick himself up and find this bright side of life. He wants to change his life so he can be "full again" not depressed and empty.