I feel like Portugal the Man's album "In the Mountain in the Cloud" is something that Clark would listen to a lot if he was still a teenager when it came out. It really feels like it represents this aspirational critique of the world he has, and yet still lost at how to reach his dream of being wise enough to use his powers.
Plus you know, the whole christian thing except he probably doesn't really believe in god but still wonders if there is a greater plan and what role is he supposed to play in it. I think his summers of longing for answers to his questions are probably really emphasized in the closing track in particular "Sleep Forever". But this one works too