Galatians 4 "Slaves"

If you think about it long enough and give it serious thought, I believe we can agree that we are all slaves to what is most important to us at any given moment.  My question to myslef and you is what do you want to be a slave to?  Something that will cause you joy now and pain in the end or something that causes joy and pain now and inheritance of eternal life in the end.  We need to be slaves to Christ just as a son is a slave (in the biblical sense) to his father to recieve the inheritance of his father.