Fullness is measured by overflow, you being yielded surrendered always wanting to Him in you to be an answer to everybody around you allowing God to move through you in fullness. Trusting in God wholeheartedly will allow Him to increase in your life. As you intimately know Him you will actually be able to be used by Him, to be useful in the Kingdom, but when you lean on your own understanding everyday of ur life it shows that you dont know Him, and you will continue to pray and ask for things that war against Gods Word.