My son. This is no mere hypocritical affectation of tenderness. Joshua feels for the criminal, even though he is forced to put him to death. So in cur own day the spectacle is not uncommon of a judge melted to tears as he passes sentence of death on the murderer.
The expression seems almost to imply a belief that, though Achan must undergo the extremest penalty of the law in this world, Joshua entertained a hope that he might be forgiven in the next. It certainly proves that, stern as the law of Moses was, it was felt, at least in those early days, to be rather against the sin than the sinner that its severity was directed.
In commenting upon the severity of the Mosaic covenant, whether towards offenders against its provisions or against the Canaanites, we must remember Bishop Butler's caution, that in this world we see but a very small portion of the whole counsel of God.
Give glory to the Lord Cod of Israel, and make confession unto Him. Literally, offer (or impute) glory to the Lord God of Israel, and give confession (or praise) unto Him (cf. John 9:24). The meaning is to give honour to God as the all-seeing God, the revealer of secrets, by an open confession before men of what is already known to Him.
It may have been a common formula of adjuration, though Masius thinks otherwise.