*pops out of internet hibernation*
As inspired by the title of the 70's (or whatever) self-help book.
Fi: "I'm ok, you're ok" (don't bother me and I won't bother you)
Fe: "I'm not ok if you're not ok" (seriously, it bothers me to see you upset)
Ti: "You're not ok, but I'm ok with that" (I think you're a douchebag, but I can live with it)
Te: "You're not ok and I'm not ok with that" (I feel compelled to point out what's incorrect about what you just said/did)
Bonus round: Ti and Fe manifest similarly in that they don't feel driven to express their disagreement - Ti because they don't care, Fe to maintain group harmony. Similarly for Te/Fi - they're much more likely to express themselves when wronged.
*vanishes in a cloud of OP MIA*