Meaning of the word "it is a poor heart that never rejoices" in English

What does "it is a poor heart that never rejoices" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

it is a poor heart that never rejoices

US /ɪt ɪz ə pʊr hɑrt ðæt ˈnɛvər rɪˈdʒɔɪsɪz/
UK /ɪt ɪz ə pɔː hɑːt ðæt ˈnɛvə rɪˈdʒɔɪsɪz/
"it is a poor heart that never rejoices" picture

Idiom

even in difficult times, one should find a reason to be happy or celebrate; it is unnatural to never feel joy

Example:
We've had a tough year, but let's celebrate your graduation; it is a poor heart that never rejoices.
I know we are busy, but take a moment to enjoy the success; it is a poor heart that never rejoices.