Piper’s sermon (article) lists several points. Here’s one that’s especially important in conflict:

• “Humility knows and feels that it is fallible, and so considers criticism, and learns from it; but also knows that God has made provision for unshakable human conviction, and that he calls us to persuade others.”

-John Piper

Read the whole thing here.

(GSiV: Phương Pháp Giải Quyết Xung Khắc; Ray Ortlund ; Humility; Gospel Grace Versus Dead Religion–part 5)