i would tell him the symptoms of the disease and how to help him out of it.
Explanation:
I would tell my cousin that major depression is a serious illness that affects his feelings negatively by affecting his thoughts and his feelings. That though it is treatable, it comes with a lot of feelings that are usually feelings of sadness and it could keep make his life dormant by making him lose interest in all the activities that used to excite him. And how it could result in emotional and physical problems for him. I would make mention of some of the symptoms of this disease:
Hammurabi described in Babylon time that There was a social pecking order present in ancient Babylonia in which the nobles were ranked above freedmen and over slaves.