This verse is often misinterpreted as a blanket promise of physical immortality or guaranteed long life for all believers who simply pray for it, ignoring its specific royal context praising God's blessing on David amid victory; prosperity preachers twist it into a health-and-wealth formula, while others overlook its messianic foreshadowing of eternal life through Christ, reducing it to mere temporal prosperity without regard for suffering or divine sovereignty.
Psalms 21:4
King James Version (1769)
4 He asked life of thee, and thou gavest it him, even length of days for ever and ever.
Psalms 21:4 celebrates God's generous response to the king's request for life, granting him extended earthly days and eternal existence, highlighting divine favor, protection, and ultimate triumph over death in the context of a royal psalm praising God's victories and blessings on David, which prophetically points to the Messiah's everlasting reign and resurrection.