Thou shalt also consider in thine heart, that, as a man chasteneth his son, so the Lord thy God chasteneth thee.
Know then in your heart that as a man disciplines his son, so the Lord your God disciplines you.
Know then in your heart that, as a man disciplines his son, the Lord your God disciplines you.
You should know in your heart that as a man chastens his son, so the Lord your God chastens you.
Think about it: Just as a parent disciplines a child, the Lord your God disciplines you for your own good.
Know then in your heart that as a parent disciplines a child so the Lord your God disciplines you.
You shall consider in your heart that as a man disciplines his son, so Yahweh your God disciplines you.
Thus you could understand that the Lord, your God, was disciplining you, just like a father disciplines his son.