Girdeth.--The importance of the girdle in a country where the dress was loose and flowing is shown by many passages of Scripture. It is essential to the warrior as here (comp. Ephesians 6:14, and the Greek expression, "to be girt" = to be armed), but also for all active exertion.
Way.--Here, not of conduct, but the military path, the march. Notice the variation in Samuel.
and maketh my way perfect; or safe, or prosperous. God removed every impediment and obstacle out of his way, and made it plain and easy, as Jarchi observes; and succeeded him, and gave him victory over his enemies; this has been verified in Christ, who has conquered sin, Satan, the world, death, and the grave: for this is not to be understood of the way and course of David's life and conversation, which was not perfect and unspotted, but had many blemishes and imperfections in it, which he often owns, confesses, and bewails.