In un'ora Dio lavora.
"God gets a lot done in an hour."
You use this one when a bunch of things you've been working on for a long time suddenly all come together all at once. Like let's say you find a job, a girlfriend and an apartment all in the same day, you attribute your good luck to God and say, "In un'ora Dio lavora."
Grammatically it's a good example of the feminine indefinite article before a vowel - un'. Ciao for now!