In our song books we sing a song entitled "Who Will Follow Jesus?" The chorus of that song says: "Who will follow Jesus? Who will make reply, I am on the Lord's side; Master, here am I"? Those words no doubt are taken from the book of Matthew, chapter 12, verse 30, where Jesus said: “He who is not with Me is against Me, and he who does not gather with Me scatters abroad.” Jesus plainly taught that we are either for Him or we're against Him. We cannot serve two masters (Matthew 6:24). We're either on the Lord's side or we're not.
All of us should look to our service for Christ the same way. We should enjoy being on the Lord's side and therefore do everything we do with fervent zeal, knowing that our eternal peace will someday be realized, because we were always determined to do ALL the will of Jesus (Matthew 7:21). In addition, when we're on the Lord's side, then we will be happy in all things that we do (Ephesians 1:3). We also want to be on the Lord's side because it is honorable (John 12:26). We will be glorified (Romans 8:17), will have peace (John 16:33), and will reign with Christ forever (2 Timothy 2:12) when we make it known that we are on the Lord's side!
Not only the believers, but the whole-hearted (Matthew 12:30), and those that overcome the world (Revelation 17:14), will be counted as being on His side. When one chooses to come out from the world and be separate (2 Corinthians 6:17) then they are making a statement by letting others know that they are choosing to be on the Lord's side. Only the faithful, and those that endure to the very end will be on His side forever (2 Timothy 2:12).