Although the Bible repeatedly warns against fretting, believers fret because of others. Sadly, one’s worry can make the sin of others seem more desirable. We should not fret because of “evildoers” (Psalm 37:1), or “him who prospereth in his way (Psalm 37:7), or “the man who bringeth wicked devices to pass” (Psalm 37:7), or even “evil men” (Proverbs 24:19). Some believers may fret about these people because of their fears, but the scripture offers another reason why believers fret over the wicked. According to Psalm 37:1 and Proverbs 24:19, fretting over the wicked is directly associated to one’s envy toward them. Perhaps believers worry about these people so much because there is a deep-rooted desire to become like them. This desire can be rooted in the fact that those whom we fear are viewed as more powerful, more in control, and even more confident. Eliminate the envy and you will eliminate the fear.
A zealous person is contagious, both positively and negatively. The apostle Paul cautioned that the early believers had been zealously affected, but not in a good way. Those who opposed the gospel were adamant, yet they unwisely waged war against the truth. Night and day, they zealously fought in order to hinder the ministry of the believers. Ultimately, their zeal affected the people of God. These believers who started strong were hindered by the enemies' efforts to the point that it affected their race for the Lord (Galatians 5:7). Modern day enemies of the gospel are aware of this potential pitfall for the believers. They often display more zeal than those who knowingly possess the truth. Yet, today's passage also teaches that “it is good to be zealously affected always in a good thing.” Zeal breeds zeal. Zeal in righteousness will yield righteous results.