On the Quote "We Have No Other Business Here Than to Get to Heaven"

I would like to make use of a quote which I paraphrase here as follows: *``We have no other business here than to get to Heaven. Everything else is a waste of time.''* I think that it (or something like it) had been uttered by a Catholic Saint, or at least by someone beatified in the Catholic Church. Does anyone recollect which Saint said this, what the exact quote is, and where I may fine it? Thank you.