Separation is the outcome of separation! When a nation (i.e., Israel in the Old Testament) or an individual (i.e., a believer in the New Testament) is set apart by the Lord, that nation (or person) has become disassociated with the rest of the world. Moses made this point in Exodus 33:16 when he said, “For wherein shall it be known here that I and thy people have found grace in thy sight? is it not in that thou goest with us? so shall we be separated, I and thy people, from all the people that are upon the face of the earth.” Separation is not something accomplished through diligence but occurs naturally after a person comes to know Christ as Saviour. Christians who remain attached to the world find little satisfaction with the things of the world or less appeal for the things of God.
The Lord wants His children to have joy and that without limitations. He wants Christians to experience the fulness of joy that only comes from right relationships. This fulness only exists in the lives of believers as certain conditions are met. The right relationship involves fellowship with God which in turn evolves into the right kind of fellowship with other believers. According to today's passage, the words of the Lord Jesus bring fulness of joy to the saint of God. Additionally, answered prayer offers fulness of joy (John 16:24). In addition to our fellowship with the Lord, the Bible suggests that fellowship with other believers also yields fulness of joy (2 John 1:12). Every astute Bible student recognizes that these two fellowships are inextricably linked (1 John 1:3). No dedicated Christian can experience true fellowship with other dedicated believers without first having the right kind of fellowship with God Almighty.