“He poured out this Spirit on us abundantly through Jesus Christ our Savior so that, having been justified by His grace, we may become heirs with the hope of eternal life.” Titus 3:6-7 HCSB

The Holy Spirit brings hope of eternal life. The Holy Spirit is poured on us abundantly like the oil that would be poured out on the newly appointed king or priest. 

"How good and pleasant it is when brothers live together in harmony! It is like fine oil on the head, running down on the beard, running down Aaron's beard onto his robes. It is like the dew of Hermon falling on the mountains of Zion. For there the Lord has appointed the blessing — life forevermore."

Psalms 133:1-3 HCSB

https://www.bible.com/72/psa.133.1-3.hcsb

"Samuel took the flask of oil, poured it out on Saul's head, kissed him, and said, "Hasn't the Lord anointed you ruler over His inheritance?"

1 Samuel 10:1 HCSB

https://www.bible.com/72/1sa.10.1.hcsb

"So Samuel took the horn of oil, anointed him in the presence of his brothers, and the Spirit of the Lord took control of David from that day forward. Then Samuel set out and went to Ramah."

1 Samuel 16:13 HCSB

https://www.bible.com/72/1sa.16.13.hcsb

Are we still changed from the day of salvation? Are we still changed from the day the Holy Spirit was given to us? 

"But you will receive power when the Holy Spirit has come on you, and you will be My witnesses in Jerusalem, in all Judea and Samaria, and to the ends of the earth.""

Acts 1:8 HCSB

https://www.bible.com/72/act.1.8.hcsb

We cannot be a great witness apart from the Holy Spirit!