"We must be empty if we want God to fill us. We must be able to give ourselves so completely to God that He must be able to possess us. We must give whatever He takes and take whatever He gives. 
Total abandonment consists of giving oneself fully to God because God has given Himself to us. If God, who owes us nothing, is willing to give us nothing less than Himself, can we respond by giving Him only a part of ourselves? 
Renouncing myself, I give myself to God that He might live in me!"
 -Mother Theresa