Every person on this earth is a spiritual son or a daughter of God. Every seed has potential to become like that from which it came. When the Savior commanded us to be perfect, he wasn't giving us an impossible goal. Perfection may be a long way off, but each of us have the ability to improve ourselves one step at a time. We may not reach perfection in this life, but death does not mark the end of the process. But to be motivated to faith in this life, we must believe that eventually we can reach our potential--the perfection of our Father.