I have had many of my friends ask me this. Sometimes when friends spend the night they ask if we have to go. the problem is some of my friends don't know why we go to church. One reason is because no one person can know everything that the Bible tells us. Even if someone has read the Bible eight times they may know the bible from thier perspective. When we go to church we can understand things from more peoples perspectives. Then you can learn more each time we read the Bible. That is how i think about it.