“I gave myself one big warning: if you become a professional Christian, you better not be nice. Niceness is not a biblical virtue; in fact, I consider it a vice. Nice Christians pretend things are fine when they’re not, say one thing and do another, and avoid difficult conversations. Niceness is rampant among Christians and it does damage. The real virtues of our faith such as honesty, love, discipleship, repentance and reconciliation require looking life full in the face and speaking truth as best we can.”
– Jennel Williams Paris
stephenboutrywords 
I don’t know Jennel or anything about her, but I totally agree with her. Bill Hybels has used the phrase – “terminal niceness” for years; shorthand for the point Jennel makes. Keller likes to say (channeling C.S. Lewis) – We’re not called to be ‘nice’ we’re called to be new.
Per usual, love Keller: new vs. nice.