Charles Ellicott Commentary Hebrews 12:10

"For they indeed for a few days chastened [us] as seemed good to them; but he for [our] profit, that [we] may be partakers of his holiness." — Hebrews 12:10 (ASV)

After their own pleasure.—Rather, as seemed good to them. The contrast is continued here between human liability to mistake and the perfect knowledge of our heavenly Father, who seeks our profit, and cannot err in the means He employs. There is a general resemblance between this verse and the last, the few days corresponding to the fathers of our flesh; and the last clause here, that we may be partakers of His holiness, to the words which close Hebrews 12:9, and live. To the few days no contrast is directly expressed in the second member of the verse; none was needed, because the last words so clearly imply the permanence of the result.