Thou shalt also consider in thine heart, that, as a man chasteneth his son, [so] the LORD thy God (e) chasteneth thee.
(e) So that his affliction are signs of his fatherly love toward us.

Thou shalt also consider in thine heart,.... Frequently think of, and meditate upon, revolve in their thoughts, well weigh in their minds, and take into thorough and deliberate consideration in their hearts; it being a matter of great moment and importance to them for their peace and comfort and the glory of God, namely, what follows:
that as a man chasteneth his son, so the Lord thy God chasteneth thee; that they stood in the same relation to God as a son to a father, and therefore happy and honourable; that all their afflictions came from God, were appointed, sent, directed, and overruled by him for his own glory and their good; that these were the chastenings and corrections of a father, and were not done in wrath, but in love, and therefore should be patiently endured; and it became them to consider well from what hand they came, and in what manner, and for what ends and purposes, how they ought to behave under them, and what they should do, as follows.

In this way Jehovah humbled and tempted His people, that they might learn in their heart, i.e., convince themselves by experience, that their God was educating them as a father does his son. יסּר, to admonish, chasten, educate; like παιδεύειν. "It includes everything belonging to a proper education" (Calvin).

As a man chastiseth his son - That is, unwillingly, being constrained by necessity; moderately, in judgment remembering mercy; and for thy reformation not thy destruction.