My father’s tone of thought and feeling, I now felt myself at a great distance from: greater, indeed, than a full and calm explanation and reconsideration on both sides, might have shown to exist in reality. But my father was not one with whom calm and full explanations on fundamental points of doctrine could be expected, at least with one whom he might consider as, in some sort, a deserter from his standard. Fortunately we were almost always in strong agreement on the political questions of the day which engrossed a large part of his interest and of his conversation. On those matters of opinion on which we differed, we talked little. He knew that the habit of thinking for myself, which his mode of education had fostered, sometimes led me to opinions different from his, and he perceived from time to time that I did not always tell him how different. I expected no good, but only pain to both of us, from discussing our differences: and I never expressed them but when he gave utterance to some opinion of feeling repugnant to mine, in a manner which would have made it disingenuousness on my part to remain silent.
Note from KBJ: Mill's experience is, I think, typical. When you want to stay on good terms with someone, you shy away from controversial topics. The flip side of this is that when you want to start a fight with someone, you broach controversial topics.
Keith Burgess-Jackson, J.D., Ph.D. 