In the beginning David commends himself to the protection of God. He then meditates upon the benefits which he received from God, and thereby stirs himself up to thanksgiving. By his service, it is true, he could in no respect be profitable to God, but he, notwithstanding, surrenders and devotes himself entirely to him, protesting that he will have nothing to do with superstitions. He also states the reason of this to be, that full and substantial happiness consists in resting in God alone, who never suffers his own people to want any good thing.
Mictam of David.
As to the meaning of the word mictam, the Jewish expositors are not of one mind. Some derive it from ktm, catham, as if it were a golden crest or jewel. Others think it is the beginning of a song, which at that time was very common. To others it seems rather to be some kind of tune, and this opinion I am inclined to adopt.