Spiritual Deliverance is Salvation
Just as salvation from sin and healing from sickness was provided for through the Blood of Christ, so has deliverance from evil spirits been accomplished through His death and resurrection. Jesus, on earth, freely cast out demons to free the souls they had been possessing. To be free from demons is to be free from bondage. To be free from bondage is to be free to willingly serve the Living God, in a spirit of joy!
10He was teaching in one of the synagogues on the Sabbath day. 11Behold, there was a woman who had a spirit of infirmity eighteen years, and she was bent over, and could in no way straighten herself up. 12When Jesus saw her, he called her, and said to her, “Woman, you are freed from your infirmity.” 13He laid his hands on her, and immediately she stood up straight, and glorified God. Luke 13:10-13
16Ought not this woman, being a daughter of Abraham, whom Satan had bound eighteen long years, be freed from this bondage on the Sabbath day?” Luke 13:16
It is clear that Satan was the one binding her. He had been oppressing her to the point of a prominent, physical symptom: that of being permanently hunched over. Moreover, he had done this for 18 years! The Lord clearly saw this as something to be challenged, not accepted. She desired deliverance from the power of the Enemy, and Christ Jesus accomplished it by the Holy Spirit.
There is another story in Luke's Gospel that pertains to this.
27When Jesus stepped ashore, a certain man out of the city who had demons for a long time met him. He wore no clothes, and didn’t live in a house, but in the tombs. 28When he saw Jesus, he cried out, and fell down before him, and with a loud voice said, “What do I have to do with you, Jesus, you Son of the Most High God? I beg you, don’t torment me!” 29For Jesus was commanding the unclean spirit to come out of the man. For the unclean spirit had often seized the man. He was kept under guard, and bound with chains and fetters. Breaking the bonds apart, he was driven by the demon into the desert. 30Jesus asked him, “What is your name?” He said, “Legion,” for many demons had entered into him. 31They begged him that he would not command them to go into the abyss. 32Now there was there a herd of many pigs feeding on the mountain, and they begged him that he would allow them to enter into those. He allowed them. 33The demons came out of the man, and entered into the pigs, and the herd rushed down the steep bank into the lake, and were drowned. 34When those who fed them saw what had happened, they fled, and told it in the city and in the country. 35People went out to see what had happened. They came to Jesus, and found the man from whom the demons had gone out, sitting at Jesus’ feet, clothed and in his right mind; and they were afraid. 36Those who saw it told them how he who had been possessed by demons was healed. Luke 8:27-36
In Greek this final verse says that the people were telling others how this man who had been demon possessed had been "saved." This word is used in connection with forgiveness of sins as well as physical healing. It means deliverance. Jesus saved this man from the demons who had been inhabiting his body. To enter into the full salvation of the Lord is to enter into the possibility of complete deliverance from every evil spirit.