With you as my strength
“God, all at once you turned on a floodlight for me! You are the revelation-light in my darkness, and in your brightness, I can see the path ahead. With you as my strength, I can crush an enemy horde, advancing through every stronghold that stands in front of me. What a God you are! Your path for me has been perfect! All your promises have proven true.  What a secure shelter for all those who turn to hide themselves in you!  You are the wrap-around God giving grace to me” 
Psalm 18:28 30 (TPT)
God is Your only Source.
God is Your only Strength.
God is Your only True Success.
When you know, understand, constantly, and consistently acknowledge God as your all in all, nothing can stand in your way.
“ I can of mine own self do nothing: as I hear, I judge: and my judgment is just; because I seek not mine own will, but the will of the Father which hath sent me.” John 5:30 (KJV)
Jesus acknowledged God the Father as His source.
“Jesus looked at them and said, “For people this is impossible, but for God all things are possible.” Matthew 19:26 (NCV)
David knew this, and that’s why he could face all the challenges before him and succeed.
Recognize God as your source.
You will always and regularly fulfill your purposeful life.