Prayer...diligent prayer. And as you said earlier (to paraphrase), if we focus on the big picture (Him), all our little disagreements melt away.
And if a disagreement still bothers us, reach out in humility instead of contentiousness and, at least in my experience, what we thought was a difference might be just a misunderstanding.
Humility is in short supply these days...
Often-times, I find that our disagreements are indeed misunderstandings. Thus, I post here to try to clear up such things. For example, many Protestants believe that Catholics believe in "works salvation", which we don't. But to the outsider, it might appear that way. But when I discuss such issues with another, a lot of the times, we agree in principle. I also like to think that the other person may have a better understanding of the Catholic way of coming to God. Since misinformation and misunderstanding is often WHY many people hate the Catholic Church, such conversation is necessary to clear away ignorance. The topic of this thread, however, doesn't help matters, in my opinion.
As long as man's mind is clouded in sin, it is difficult to tell if something is from the Spirit, the Devil, or our own minds... Time will tell. Prayer is good advice.
Brother in Christ