Psa 18:46 The Lord lives! Blessed be my rock! Let the God of my salvation be exalted
The Lord, He and He only is the true living God, therefore He knows, hears, acts, relates etc. David in this learned the secret of personalizing his relationship with God in every situation (My rock, MY fortress, MY shield, MY comfort, MY salvation, MY horn, MY strength) but not in a selfish way. The God who lives sees people collectively and He is also concerned about you and your needs as an individual.
Think of this, He has curved you in the palm of His hands. “…the very hairs in your head are all numbered“, Mat 10:30. I can’t even tell when I lose a hair, He does, that is how much He knows you. Therefore join men like Paul, David, Job in declaring “Lord is MY”. “But MY God shall supply all your needs…(Phil 4:19). “For thou oh Lord are a shield for ME, the glory and the lifter of MY head”(Psa 3:3). “God is MY refuge and strength, a very present help in trouble”(Psa 46:1). “I know MY Redeemer lives…“(Job 19:25). “O Lord, You are the portion of MY inheritance and MY cup; You maintain MY lot” (Psa 16:5). God is for us.