17. Be unceasing in prayer [praying perseveringly];
18. Thank [God] in everything [no matter what the circumstances may be, be thankful and give thanks], for this is the will of God for you [who are] in Christ Jesus [the Revealer and Mediator of that will].
19. Do not quench (suppress or subdue) the [Holy] Spirit;
20. Do not spurn the gifts and utterances of the prophets [do not depreciate prophetic revelations nor despise inspired instruction or exhortation or warning].
21. But test and prove all things [until you can recognize] what is good; [to that] hold fast.