Truth be told, the two of you probably don't have a lot in common when it comes to what you value. While you may share some commonalities in religion, political orientation, or other affiliations, the way you think about the world and what is important is fundamentally different. If you agree on matters of morals and ethics, it's probably for very different reasons.
Your values system is based on a deep empathy and compassion for others. You can't watch the news without feeling the pain of starving children; those commercials with sad kitties at the pound were made for people
just like you
. Because compassion is such a big part of who you are, it motivates your biggest decisions in life. Your career was probably chosen because it is consistent with your values and the changes you want to make in the world. Your friends are probably people who feel the way you feel about the issues that are dear to your heart.
In contrast, your counterpart is deeply practical and logical. It's not that they don't care about others; they just don't spend quite as much time and energy caring as you do. And when they are concerned with other people, they typically feel that a pragmatic solution is the best one. They might spend an afternoon helping a needy friend fix a broken window, or donate money to a local school. But typically their instinct to help is out of a sense of dutiful social responsibility, rather than the empathetic heartache that's more familiar to you. And usually, once they've helped, they move on with their day. Caring for others is unlikely to be as central to their lives as it is to yours.
You may find yourself deeply hurt by your counterpart's approach when discussing values that are important to you. You are deeply idealistic and easily imagine how the world could be a better place. They, on the other hand, don't visualize quite so easily, and they often don't see a big problem with how the world is now. They tend to be suspicious of new ideas and blunt in their communication, which in practice means that they'll often unceremoniously shoot down your suggestions with "That would never work in the real world" or "What planet are you on?!"
On the other hand, because you are so different, you have the opportunity to introduce one another to new ways of thinking. Your counterpart tends to value tradition and the wisdom of experience much more than you do, and they can help you to see the merit in looking to the old ways. And if you're willing to stick with them, you have the ability to help them become softer, gentler, and more emotionally in tune.