Passage
pray unceasingly;
pray unceasingly;
1 Thessalonians 5:15 See that no one render to any evil for evil, but pursue always what is good towards one another and towards all;
1 Thessalonians 5:16 rejoice always;
1 Thessalonians 5:17 pray unceasingly;
1 Thessalonians 5:18 in everything give thanks, for this is [the] will of God in Christ Jesus towards you;
1 Thessalonians 5:19 quench not the Spirit;
The verse centers on "pray" and "unceasingly". It is saying that the verse draws attention to "pray" and "unceasingly", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 16's "rejoice always..." into verse 18's "in everything give thanks for this is...", so "pray" and "unceasingly" belong inside that flow. In 1 Thessalonians context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "pray" and "unceasingly" with trust shaped by these words, not by a vague optimism outside the passage.