When he tells us to think the same thing, he is not suggesting that we must never disagree over something. As you know, there are times that we disagree about certain matters. Politics is one good example. That's why there is more than one party. You have Democrats and Republicans.
People disagree about political ideologies.
We don't always see things the same way and at times there are misunderstandings among us about certain matters. I heard about a woman that answered the knock at her door and found a destitute man standing there. Well, here's a gallon of green paint and a brush. Go behind the house and you'll see a porch that needs repainting. Be very careful.