I especially like this as a reminder to capture what God is doing in my life through the discipline of journaling. There are x things that Moses relates to us here:
Second, we are to keep our soul diligently. This foreshadows Solomon’s exhortation in Proverbs 4:23. When we come to the Lord to examine ourselves it is not to be a cursory look. We need to dive deep to ask God with what we should be dealing.
Third, Moses gives us three reasons for this discipline. The first is so that we do not forget what we have seen. You and I quickly forget as did the nation of Israel what God does for us. Recording His work in our lives can mitigate some of our forgetfulness.
The second reason closely follows the second. We need to keep in our heart, in the center of our lives all that God has done for us.
The last of the three may be the more important, spiritual reproduction. The purpose of all that Moses sets forth here is so that our children and grandchildren will know what we have seen and known in our hearts about our God. Think of the legacy of a clear picture of your walk with God passed down to your grandchildren. That is a valuable foundation on which they can build.