Galatians 4:8 Howbeit then, when ye knew not God, ye did service unto them which by nature are no gods.
9 But now, after that ye have known God, or rather are known of God, how turn ye again to the weak and beggarly elements, whereunto ye desire again to be in bondage?
10 Ye observe days, and months, and times, and years.
11 I am afraid of you, lest I have bestowed upon you labour in vain.
Many of the Galatians had been heathen people, before they received Christ as their Savior. They truly had not known what, or whom to worship, until they received the Truth through Jesus Christ. They only worshiped things they could see and feel and these things were not God.We will never know God in the fullest sense, until we are in heaven with Him. He knows us though. How can they even think of turning away from the freedom they know in Christianity and go back to the bondage of the law? The people back then wanted to continue to worship the the traditions of the law and still be Christians. This is one of the reasons the Christians celebrate Sunday instead of Saturday for their holy day. The Christians are celebrating the resurrection of Jesus. The others are living in the law. Because of this Paul feels he has wasted his time because it seems they have forgotten everything they had been taught. This lets us know we need to stay in the true wood of God daily so as not to go back to the things of this world.