The spilled tea was gone before he can really focus on it, and Aziraphale felt grateful, absurdly, for the distraction.

"If you're sorry," he said, and fiddled for a moment with his tea, "then that is enough, for many. A bout in Purgatory makes up for the somewhat unrighteous types... not that they mean to be, it's simply a matter of celestial opinion. So..." he faltered, "I mean, I can't impart a great deal, a lot of it is belief and faith - you have to believe yourself capable of being good enough for Heaven, or making the effort to be good. Although... it's a good deal less paperwork when one does follow all the 'rules'."