The Preparation
fundamentally signifies “separated” (among the Greeks, dedicated to the gods), and hence, in Scripture in its moral and spiritual significance, separated from sin and therefore consecrated to God, sacred.
Christians are already holy unto God by consecration; they must be so also in their outward walk and behavior in all respects. The outward must correspond to the inward man.
“reverential fear,” (1) of God, as a controlling motive of the life, in matters spiritual and moral, not a mere “fear” of His power and righteous retribution, but a wholesome dread of displeasing Him, a “fear” which banishes the terror that shrinks from His presence, Rom. 8:15, and which influences the disposition and attitude of one whose circumstances are guided by trust in God, through the indwelling Spirit of God,
“Reverent fear” is evidenced by a tender conscience, a watchfulness against temptation, and avoiding things that would displease God.
Their right to call God Father leads to their obeying Him in reverent fear. So they are to live according to His absolute standards, as strangers (cf. “aliens” in 2:11) to the world’s shifting, situational ethics.