Regarding the "cope" line, I take it mean something more about using faith as ignorance. In the previous line ("If I do let go, I hope you never see / there is no one there that's waiting after me"), he expresses the hope that when he dies, the person he cares about can hold onto the idea that he's being looked after in heaven, instead of considering the possibility that there's no afterlife. In the line "I hope if there is one thing I let go, it is the way that we cope", I think he's furthering those feelings to say that he wishes he could forget/leave alone/"let go" the way that people deal with loss by telling themselves their loved ones are in a better place even if they don't really believe it. (This is just my reading of Andy's words, and maybe not what he meant by them at all.)
Regarding the "cope" line, I take it mean something more about using faith as ignorance. In the previous line ("If I do let go, I hope you never see / there is no one there that's waiting after me"), he expresses the hope that when he dies, the person he cares about can hold onto the idea that he's being looked after in heaven, instead of considering the possibility that there's no afterlife. In the line "I hope if there is one thing I let go, it is the way that we cope", I think he's furthering those feelings to say that he wishes he could forget/leave alone/"let go" the way that people deal with loss by telling themselves their loved ones are in a better place even if they don't really believe it. (This is just my reading of Andy's words, and maybe not what he meant by them at all.)