There are two most important things that every Christian needs to know and apply in their lives. Firstly, they must love the Lord their God and secondly love their neighbour or other people like themselves.Their is only one true God. That God is God the Father, God the Son, manifest on earth as Jesus and God the Holy Spirit. Without God's foundation of His love through us to Himself, and to other people we will live a useless life. We are created by God to live as lovers of all who God is and that which He has made possible for our fulfillment in Him.