Why should we start to command our souls just as David once did

According to John Barnett, our souls are controlled by our sinful fleshly desires. Left to their own devices they are double-minded and filled with doubt and dis- couragement. Therefore, we need to follow David's excellent example, and let him both teach and instruct us how to speak to and command our own souls. In order for them they to become fully aligned with our born again natures and the Holy Spirit. (A modified version of his lecture to his students) BLESS the LORD, O my soul; And all that is within me, bless His holy name! And forget not all of His benefits: Who forgives all your iniquities, Who heals all your diseases, Who redeems your live from destruction, Who crowns you with lovingkindness and tender mercies, Who satisfies your mouth with good things, So that your youth is renewed like the eagle's. The LORD exercises righteousness And justice for all who are oppressed. He made known His ways to Moses. He acts to the children of Israel. The LORD is merciful and gracious, Slow to anger, and abounding in mercy. He will not always strive with us, Nor will He keep His anger forever: He has not dealt with us according to our sins, nor punished us according to our inequities. For as the heavens are high above the earth, So great is His mercy toward those who fear Him; As far as the east is from the west, So far has He removed our transgressions from us. As a father pities his children, So the LORD pities those who fear Him. He knows our frame; He remembers that we are dust. Ps 103:1-14 HE who dwells in the secret place of the Most High Shall abide under the shadow of the Almighty I will say of the LORD,"He is my refuge and my fortress; My God, in Him, I will trust. Ps 91:1-2 My Modern psalm When I am at my most weakest You LORD God are at Your Most strongest Granting to me Your wondrous Grace and merciful kindness to me enabling me to carry on. Unto to You my LORD and King My heart shall rejoice; my spirit Shall sing. You are both my Savior and my King; Without You I would return to the dust of earth. When I cry out to You in my pain and anguish too, You are always around To comfort and reassure me that You will never leave me nor forsake me. For lo, You are with me always even unto the ending of the age. O LORD God Almighty please teach me How David commanded his own soul? Fully knowing that someday I shall walk upon streets of the purest gold. For you have cast away all of my sins and inequities into the deepest sea; saving me!