God calls people into different works. In the midst of this diversity, a common thread unites all the work—men ought to do all they do to the glory of God.
Men tend to fret over the motives behind others’ actions. Instead, men should trust the Lord to deal with the motives at the judgment seat of Christ.
How would making your motive match the Lord's motive change how you approach the Christian life (from witnessing to praying to Bible reading and so on)?
False teachers are extremely dangerous because they undermine truth! Their rotten fruit may not surface for some time, but when allowed to continue unchecked, they will deceive individuals, whole families, and good churches. Paul warned Titus that such teachers had already seen some success and that their mouths must be stopped. Regretfully, whole houses had already been subverted with the false teachers still at work. A similar situation is recorded in Acts 15:24 where the saints of God were “troubled” by the words of false teachers. There is no telling how many of God’s people have walked away from sound doctrine because of false teachers. Worse yet, how many souls are burning right now in hell because they trusted in a false gospel?
