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.
As we have previously studied, God is the believer’s source of joy. Specifically, God’s indwelling presence makes this an accessible virtue. The Lord indwells those who are saved and does so through the person of the Holy Ghost. It should, therefore, come as no surprise that the disciples who were filled with the Holy Ghost were also filled with joy. God identifies the nature of the kingdom of God as “righteousness, and peace, and joy in the Holy Ghost” (Romans 14:17). This is why the Bible includes joy and peace when it defines the ninefold fruit of the Spirit (Galatians 5:22). This is why the believers in Thessalonica received the word “with joy of the Holy Ghost” (1 Thessalonians 1:6). The more the Holy Ghost has control, the more joy from the Lord a man will experience.
