What are some example sentence of the idiom keep your chin up?

* "Keep your chin up," said Mary to her friend who had just lost her job.

* "Don't let those bullies get you down, keep your chin up and they'll eventually leave you alone," the teacher said to the student.

* "Yes, i failed the test, but that's okay. I'll keep my chin up and study hard for the next one," said the student.

* "Don't give up now you've come so far, keep your chin up and you'll make it through this," said the therapist to her patient.

* "No matter what life throws your way, it's important to keep your chin up and never give up," said the motivational speaker to the audience.