Church ain't out till they quit singing

Meaning:

• Things have not reached the end.
• There is still a chance that a situation can change.

Example sentence:

Don't be so pessimistic. We can still win the match. Church ain't out till they quit singing.


Questions for you to answer:

1. When did you last say to somebody something like 'Church ain't out till they quit singing'? Why was that?
2. Can you think of another idiom meaning the same?
3. Where and when do you think this idiom originated? Just your own ideas :-)