One of my NT professors from AGTS, Ben Aker has written what I would say is a tremendous article on the Biblical distinction between Regeneration and Spirit Baptism in reference to John 20:19-23 and Acts 2. Trust me, its really good!
Dr. Aker writes:
There are two Biblical texts that scholars often discuss, frequently misinterpret, and thus confuse regarding regeneration and the baptism in the Holy Spirit. They are John 20:19-23 and Acts 2. In the first of these references the word “breathed” occurs. This study then will focus on the meaning and use of the word in John 20:22. I propose that “breathed” refers to regeneration and concerns an actual, supernatural event in which Jesus imparts eternal life to the first disciples through the Spirit. This paper will discuss“ breathed” under two main headings: its lexical and conceptual meanings and uses and the contribution of John’s theology to its meaning and use.
Well, it blessed me and I hope it will bless you too!