The greatest thing you can give to God is your self, your total self, your undivided self.  Fully!  Without reluctance!  Without reservations!  Nothing held back!  God gave himself fully to us in His Son.  Make a full offering to Him who made a full offering to us.  We talk of giving God our tithe, our time and our talents.  When we give Him the fullness of who we are, then the tithe, time, and talent shall follow.  Give Him you.  This is the gift you need to make.

“And do not go on presenting the members of your body to sin as instruments of unrighteousness; but present yourselves to God as those alive from the dead, and your members as instruments of righteousness to God…For just as you presented your members as slaves to impurity and to lawlessness, resulting in further lawlessness, so now present your members as slaves to righteousness, resulting in sanctification.” Romans 6:13,19b (NASB)