Eph 4:14) “That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive; (15) But speaking the truth in love, may grow up into him in all things, which is the head, even Christ:” Although you and I are always to speak the truth (no lies or distortions of the truth on any subject) in love, the text here is referring back to verse 14, growing in the truth of doctrine. The idea is that we grow and share that truth to those who resist it in a loving way. Remember, we wrestle not against people, but against spiritual wickedness (Chapter 6). Rule of Thumb: try your best to share as you believe the Lord would share it in your place.