Empathy. It can be extremely frustrating to care for someone deeply (as with a best friend) and disagree with the way they view the world. Just remember that they are humans too and have experiences that have guided them to their current viewpoints. I recommend engaging them on their experiences and asking what led them to see the world as they see it today. Also remember that you should be just as open about changing your views if they’re able to present a compelling argument. Mutual respect for each others’ opinions and open dialogue are how friendships blossom – the “education” part will come naturally if you focus on the dialogue.