IT IS A SAD HEART THAT NEVER REJOICES.

It is a sad heart that never rejoices.: translation

It is a poor heart that never rejoices. & It is a sad heart that never rejoices.

Prov. Even a habitually sad person cannot be sad all the time. (Sometimes used to indicate that a habitually sad person is happy about something.) •

Jill: I've never seen Sam smile before, but today, at his retirement party, he smiled. Jane: It is a poor heart that never rejoices.