I found this on a blog. I can't vouch that it's accurate (and GKC is probably the most misquoted writer in history), but it rings a bell, and it's a great quote either way:
" The object of a new year is not that we should have a new year. It is that we should have a new soul."-G. K. Chesterton
A.G. Gardiner on G.K.C.
7 hours ago