and that you make it your ambition to lead a quiet life, and to do your own business, and to work with your own hands, even as we charged you;
Study -- φιλοτιμεῖσθαι, (not the same Gk word as in 2 Timothy 2:15, but the idea is he same. "aim, endeavor, give diligent attention to" "to strive to bring something to love" "to be ambitious, to make it one’s aim" "strive earnestly") Note that this word has "philo" in it, and a play on "brother love" in v.9. Romans 15:20, Paul "aim" in Gospel pioneering. In 2 Corinthians 5:9 used of the "aim" of believers to be well-pleasing unto the Lord; and here in 1 Thessalonians 4:11 of the "aim" of believers to be quiet, do their own business and work with their own hands. "Make it one’s aim" would be a good translation in all of these passages.