We have more in common with Chrisitans than we do have uncommon. I have written about this in the past which is a common thread found throughout the New Testament. You can read about how Christians share in weeping for one another here and how we share in rejoicing with others here.
Sometimes we neglect the aspect of unity among believers (I call it the togetherness of the Christian life). We read in the Bible that believers, the church, are called a body. Christ is the head of the body, but each member (believer) is part of this body. Just like each perspective part of your body has usefulness so does the body of Christ. The apostle Paul reminds us,
“For just as the body is one and has many members, and all the members of the body, though many, are one body, so it is with Christ.For the body does not consist of one member but of many. If the foot should say, “Because I am not a hand, I do not belong to the body,” that would not make it any less a part of the body. And if the ear should say, “Because I am not an eye, I do not belong to the body,” that would not make it any less a part of the body. If the whole body were an eye, where would be the sense of hearing? If the whole body were an ear, where would be the sense of smell? But as it is, God arranged the members in the body, each one of them, as he chose. If all were a single member, where would the body be? As it is, there are many parts, yet one body. 1 Corinthians 12:12, 14-20 ESV).”