If you start reading the Bible from the beginning of Genesis, you can’t even get four words in without being confronted with two profound truth claims. First, there was a beginning. Second, God exists.
Yeshua said that the world would know the Father sent Him when His followers are united (John 17:21). Therefore, we as believers have an important duty to try to maintain unity within the body of Messiah. But in order to work towards unity, we must first identify the cause of disunity.