If psalms 1 and 2 set the thematic stage for the
psalter, the next half dozen or so give us an indication of how the
compilers of the book intended the psalms to be used. A steady rhythm
emerges, alternating between morning prayers and evening prayers,
suggesting strongly that the psalter is conceived as a prayer book for
daily (or twice daily!) use.
Psalm 5, presents itself as a morning prayer.
Like many of the psalms, its theme is one of deliverance from enemies. Unlike many of these other deliverance psalms, however, the enemies in this psalm are not necessarily military in character. Instead, the psalmist characterizes his enemies as "deceitful" and "full of lies."
Almost certainly, the occasion of this prayer was originally some sort of palace intrigue. We all know and understand how propaganda has been used over the centuries for political gain.
Spiritually, though, this psalm may serve as a reminder to us that a major portion of our Christian walk is about discerning and responding to truth. The world is not necessarily as it appears, and the values of God are often not those touted by the voices of our culture.
As a prayer, this psalm may act for us as a reminder that truth is our ally, and that our God seeks honesty from those who would serve him.