And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.
In the whole bible the Holy Spirit has got different names and very name has got functions.
The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised, To preach the acceptable year of the Lord.
For example when you say the Spirit of the Lord is upon me, there are five things that will happen, first you are anointed. Anointed means you will have demonstration of the supernatural power of God, anointing brings victory, brings you to overcome the power of darkness. Second you will be preaching the gospel to the poor, there will always be change in people life. Third, you will be able to open your mouth and the captives will be set free. Fourth, you will declare sight to the blind. Fifth, you shall set the oppressed and depressed go free, these are the people with suicidal tendency as well. Lastly you will speak prophecies, blessings on others and they shall be blessed. This whole package comes to you when you say and believe, the Spirit of the Lord is upon me.
For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father.
The spirit of Adoption will set you free from any fear, bondage or bad habit also it will give you the power to call God, Abba Father.
So the Spirit of God has got different names and each name has got different functions. But in the Luke 1 the spirit of God has a name which is not found anywhere in the Bible the Spirit of the Most High.