en_tn_lite_do_not_use/mat/05/04.md

those who mourn

Possible reasons they are sad are 1) the sinfulness of the world or 2) their own sins or 3) the death of someone. Do not specify the reason for mourning unless your language requires it.

they will be comforted

This can be stated in active form. Alternate translation: "God will comfort them" (See: rc://en/ta/man/translate/figs-activepassive)