When Martha's Jewish friends, who had been comforting her at her house, saw Mary getting up quickly and leaving, they followed her, thinking she was going to the grave site to mourn.

Truly, truly, I tell you, you will cry and mourn [i.e., over my suffering and death], but the world will be glad [about it]. You will be sad, but your sadness will turn to joy [i.e., when learning of my resurrection].