Or, “favor,” that is, the approval of God (see on v. 52). Compare the direct testimony of the Father at Christ‘s baptism (ch. 3:22).

 The process of mental growth kept pace with that of physical growth. Summed up in this expression are the intellectual, moral, and spiritual development of the child (see on v. 52).

Textual evidence favors (cf. p. 146) the omission of these words. The expression refers to the development of a symmetrical personality.

 The same two expressions, “grew” and “waxed strong,” are used of the development of John the Baptist (ch. 1:80). Both John and Jesus were hearty and vigorous.

 This passage covers the childhood of Jesus, till He was 12 years of age (v. 42), as vs. 51, 52 cover His youth and young manhood. The development of the human nature and personality of Jesus Christ proceeded apace in a normal way, except that He never once yielded to sin. He lived as a normal child and youth would live, in the family circle. He passed through these years as every human being does, so far as physical, mental, spiritual, and social growth are concerned (see on v. 52), except that no flaws marred the process of growth. This growth process clearly attests the true humanity of Jesus, as its perfection attests His divinity.