Psalm 71 - In verses 71:5-6 David proclaims that the Lord has been his hope and confidence since
“For you have been my hope, Sovereign Lord,
my confidence since my youth.
From birth I have relied on you.”
David continues in 71:17 declaring that he has spent his life being taught by God and, likewise, has himself taught others about God’s marvelous deeds throughout his life.
“Since my youth, God, you have taught me, and to this day I declare your marvelous deeds.”
David’s training would have included hearing the Law of God taught, learning the ways of God in life and seeing the Lord’s mighty deeds in both the written documents from the past and in David’s own personal adventures. During David’s life he shared these insights with others and proclaimed both the ancient accounts of the Lord’s deliverance of historical men like Noah, Abraham, Moses, Joshua and others, but also, David shared his own personal accounts of deliverance.
Now, in Psalm 71:18, David, an old man who’s adventures had come to an end, asks to be given the opportunity to continue to teach the younger generation both the scriptural testimony and David’s personal testimony. David also asks to be enabled to provide a written account of these truths to “all who are to come.” It seems David desired his story and his testimony to be part of the scriptural account handed to every generation as God’s inspired Word.