Adam Clarke on Luke 1:80

The child grew - Increased in stature and bodily vigor. And waxed strong in spirit - had his understanding Divinely illuminated and confirmed in the truths of God. And was in the deserts - the city of Hebron, the circumjacent hill country, and in or near Nazareth. Till the time of his showing, or manifestation - till he was thirty years of age, before which time the law did not permit a man to enter into the public ministry, Num 4:3. See also Luk 3:23.

So much has already been said, by way of practical improvement of the different subjects in this important chapter, as to preclude the necessity of any addition here.