when we see a small child crying because his/her toy broken, or his friend hit him we don’t cry. because we know that when we give him that toy it will eventually be broken.
same way when Arhat see us crying because we lost something, or someone scold us, or we lost our lover he is not going to get sad.
cuz he knows it is the nature of world. there is nothing to get sad or happy over these small things.
source : https://youtu.be/rptplJ_h9UM?t=1150