The Bible shows the importance of fellowship. Early Christians were “devoted” to it (Acts 2:42). But some fellowship is bad. There are people and groupls that should be avoided because of their influence. Paul said, “Do not be deceived: “Bad company corrupts good morals” (1 Cor. 15:33). We understand the corrupting nature of evil influences. If we work in a dirty environment, it’s almost impossible to stay clean. I’ve had Christians tell how difficult it is to not pick up the bad habits of the the people they work with. Bad language and joking is easy to pick up. Even in these settings, it’s wise to maintain distances. And when Christians get involved in relationships that hinder spiritual growth, they need to be abandoned.
Paul said, “Therefore, come out from their midst and be separate,” says the Lord. “And do not touch what is unclean; And I will welcome you” (2 Cor. 6:17). He said this after declaring that light and dark have no fellowship and the Believer has nothing in common with the unbeliever. The morals, or lack thereof, of the world have a corrupting influence. Christians have to beware and understand the danger of getting too close. It is careless and unwise for a Christian to drop his guard in this matter. Getting too close to the world brings the Christian a step closer to becoming like it. Christians need to be devoted to fellowshipping people of like mind and avoid bad company.
Jesus ate with sinners since He came to seek and save the lost. That’s different from fellowshipping them. In carrying out the mission, it’s important not to become like the world. But to carry out His mission of total world evangelism, we can’t separate ourselves from it. Otherwise, “you would have to go out of the world“, (1 Cor. 5:10). Jesus sent His disciples to the various cities to preach the Gospel. Only if they rejected were they instructed to turn away and “wipe the dust from their feet” and move to the next town (see Luke 9,10). It’s OK if Christian’s mingle in the world with a purpose. However because of the potential pitfalls, we must be careful to avoid evil companions.