In the wonderful world of our political discourse a message is going out there that says "facts don't care about your feelings." While true, there is a significant person who does: The Holy Spirit. As we read Ephesians 4:30, a stern warning to not grieve the Holy Spirit. The context? How we interact with each other and the way we communicate.
Don't be a jerk
Speaking the truth in love can be summed up int he phrase: Don't be a jerk when engaging with people. Yes, we all do that. We all make bad choices when we are tired, worn out, etc. Hence the teaching in Ephesians 4 that we "be angry, do not sin." Being like Jesus isn't ignoring negative emotions. Walking like Jesus does entail engaging situations with wise choices that seek people's best.
Tyranny of truth
When we speak in such a way that tears people down. When we act like a jerk. When we, as a friend would say, "hide behind God," we grieve the Holy Spirit. If one does a survey on messing with the Holy Spirit in the Bible, it does not look pretty. Being right does not mean you are right. The in your face, tactless, insulting engagements in the New Testament are very rare and settled on specific group of people. Too often I've heard "But I'm write and we're supposed to stand for truth." Yes, the Bible says that, and the Bible also describes and prescribes how we do that. Being a jerk and claiming God's will is the reason is lame. It actually hurts God.
But what if they're wrong!?
Another letter was written by Paul to the church of Ephesus called 1 Timothy. The church was a mess. They were doing things wrong. And in cleaning up that mess, Paul fleshes out what he said in Ephesians 4. It was a patient work, not an in your face work. The church was wrong, but the process of cleaning it up was both truthful and loving. Often the sentiment behind "facts don't care about your feelings" grieves the Spirit and does not build the other up. It's laziness not doing the work of ministry.