Part of becoming human meant He felt the emotions we feel; pain, joy, suffering and more material emotions; hunger, wants and needs. This He took upon Himself, so He might come to understand His creation more. That could only be done if He could experience our body for himself, thus requiring Him to incarnate into a human form in order to understand what it was like to be us. Even though He created us and thus knew a lot about us, He needed the experience of being us. And also, to sacrifice Himself for our sakes, He needed to be within our bodies, so He could be accounted as a “human” sacrifice, taking upon all of our sins upon Himself, that we might be accounted as perfect before God to enter into heaven. This is one of the most amazing things of the Incarnation, God Himself came down to view, meet and be with His Creation, to understand how they live on this Earth and not only to understand His Creation, but to save His Creation from eternal death. This is because He views us as part of His family, by adoption via the Holy Spirit.