Thank you for the application question on understanding King David from the Psalms, “How hard is it to relate to King David in the Psalms?”
Many Christians take great comfort in the Psalms for the the words of King David expresses their own thoughts and feelings. In the Psalms, the reader can identify with David’s wide range of feeling of helplessness, betrayal, false accusations, sorrow as well as hope and joy.
The Psalms may be difficult to relate if one does not have a relationship or is in fellowship with God. If one is callous to spiritual truths or carnal in one’s conduct, then it would be difficult for that person to honestly pray for God for deliverance based on one’s seeking to honor God. It would be similar to just reciting the Lord’s Prayer and believing the Lord’s Prayer. One’s attitude and action will affect how one thinks and feels about the Word of God and God himself.
Here are some Psalms that a godly person will have little difficulty relating to:
A. Psalm 25, 140 on being unjustly accused or oppressed by others.
B. Psalm 23 on being comforted with the Lord’s presence.
C. Psalm 38 on being honest and confessing one’s sin.
D. Psalm 139 on meditating on his relationship with God.
E. Psalm 66 on praising God for deliverance from trouble.
Every Christian struggles with sin in their lives. No Christian is perfect in his/her walk with the Lord. God looks at the heart of a person. If a non-Christian or Christian truly seeks God, God will hear the prayer of that person. The Psalms become more than just a recital or used to call to worship. The Psalms can become the prayer of that person who walks with God.
SUMMARY: A godly believer will find comfort and strength in the Psalms while a wayward believer in his/her stubbornness will refuse to look into Scriptures. The heart and the spirit of the person will affect his openness to the Scriptures.
For more perspectives:
https://www.quora.com/How-hard-is-it-to-relate-to-King-David-in-the-Psalms