You're intellectually and mentally compatible, and the similarities in your outlooks will help to foster a feeling of friendship between you. It's not that you'll always think in exactly the same ways; it's that your ideas and perceptions will complement each other and teach you both a lot about life and your places in the world. Your viewpoints will expand a great deal through being together, and you should both look for ways to increase this growth.
Even when you disagree on some interesting, important subject, if you talk out the reasons for your disagreement, you'll both learn something. All this positive communication and healthy outlook will increase your idealistic feelings about the world as well as about your relationship. You'll actually help each other become more forgiving and patient with other people in general, because you'll teach each other about tolerance and a holistic view of humanity.