John Gill Commentary Deuteronomy 8:5

"And thou shalt consider in thy heart, that, as a man chasteneth his son, so Jehovah thy God chasteneth thee." — Deuteronomy 8:5 (ASV)

You shall also consider in your 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 chastens his son, so the Lord your God chastens you ;
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.