keep one’s chin up

(idiom) remain cheerful during a difficult period, don’t give up

A: Medical school is so difficult. I think I’m going to quit.
B: Don’t quit, my friend. Keep your chin up! You will be sorry if you quit.

I was planning to divorce my husband, but I kept my chin up and kept trying to make it work. Now we are happily married.

From the Blogs:

Keep your chin up Andy

Media:

Similar idioms:

1. chin up
2. hang in there
3. stick it out
4. give up
5. give and take