suppose A is envious of B because B has something A doesn't.

we always say: A ought to look at what he has and appreciate it, instead of always looking at what others have.

have we ever considered what A has then? maybe there's really a reason for him to be envious.
what if he has really drawn the joker out of a pack of aces?

it is easy for us to say, to 'advise' from a distance. and we don't go through what the person goes through. talk is free; anyone can do that.