Something very great happened on the day of Pentecost. The third person of the Trinity was officially introduced. His great work on earth was officially inaugurated.

Even after the Pentecost which led to the baptism and infilling, many infilling of the Holy Spirit kept coming into the believers to replenish the Spirit and power they had received (Acts 4:8, 31 13:52). They continued to walk in the Spirit for the presence and power of God to keep reigning in their lives.

A greater openness on the side of a believer leads to a greater infilling of the power of the Holy Spirit. The baptism in the Holy Spirit introduces one to the higher working of the Spirit of God in the heart of men.  But the extent you make yourself available to the Spirit of God will determine the extent He will fill you. And the extent you are filled determines the extent you will perform greater work for God.

If you are merely filled and the Holy Spirit with a measure, to that measure, you will perform the work of God. But if you are filled with Holy Spirit without measure, you will surely perform an immeasurable work for God! An unbounded anointing leads to an unbounded work for God!
The Holy Spirit is your God, the very source of your life. He is the breath that was introduced at creation in your life. But when He is introduced into your life in a baptism in the Spirit, He comes in a more unique form! This mighty Spirit moves speedily into a regenerated soul to dwell as an altar.

He affects a marvelous change in our lives and makes sure the believer is born from above. Even after the rebirth, the Holy Spirit keeps working in our lives. He keeps on assisting us in a personal transformation to resemble God.