They have different connotations: "Hang in there" - common phrase of support. Have you seriously never heard of this? "lighten up" - dismissive, which I didn'

They have different connotations: "Hang in there" - common phrase of support. Have you seriously never heard of this? "lighten up" - dismissive, which I didn't say. "change your perspective" - Helpful advice for many situations people have to endure unjustly. If you've never been in a situation like that, be glad. If you are, and you cannot change it easily, changing your perspective works. You're trying way too hard to villainize me, to the point of erring on the side rashness. EDIT >> removed ad-hominem. Sorry, I slipped!