As we celebrate the coming of our Lord Jesus Christ to this earth it is important that we become aware of the intense heavenly struggles that took place to block His arrival. Satan has made many attempts to stop our Lord from arriving on earth as a man to accomplish His task. Christ delivered us from Satan's slavery to living freedom when we believe in Him as our savior. The measure of the wealth of God's unmerited favor to every believer is the cost of Christ's blood. It was accomplished not "out of" but "according to" the wealth of His grace. We are redeemed through His blood from our sin. Christ prevailed and, because of this, today we can celebrate His birth.
When Halal a.k.a Lucifer fell he became Satan ("adversary" in Hebrew) and polluted the heavenly realm with the sin he brought in to God's presence (Isaiah 14:13-14). He then entered the Garden of Eden, and through lying, enticed Eve to defy God. In this manner Satan became "the father of lies" because he originated lying (John 8:44).