This was the first Christian song I ever wrote and it remains a favorite. It is a profession of faith with a promise of obedience and a request for instruction.
The song is much simpler than the psalm on which the lyrics are based. Psalm 25 is thought to be (broadly speaking) the prayers of the exiles in Babylon, i.e. the words of people in danger in the hands of their enemies. As is often the case, however, the words still have relevance in today's world.
The song is in 6/8 or a fast 3/4. When I play this alone on the guitar, I have to take care not to over-emphasize the "and of 2" with an upstroke of my pick, obscuring the "three" feel.
The first chord of the chorus is a tad unusual - it's essentially a B minor with an A in the bass (in the key of A) but there's also an E stuck in there. The E functions, I think, as the fifth of the bass note (definitely not as a suspended 4th since the (minor) third is present and essential) and provides a nice "open tuning" feel. Inconclusive theory talk aside, it's played on a guitar with an A minor shape moved two frets higher.