Like wind,with the Holy Spirit, you do not see Him, but you see His impact on a man’s life -you see change.
The wind blows where it wishes, and you hear its sound, but you do not know where it comes from or where it goes. So it is with everyone who is born of the Spirit."-Jn 3:8
So, how do we know we've been born of the Spirit?
Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come. - 2 Corinthians 5:17
"Newness" is not just being "better" - being sober, or fit, or not doing this, and or doing that....the old that has passed away is all things self-focused and has been replaced by all things Christ-focused. We don't always get it right, but we have an intensity in our walk that wants to get it right, we have a goal to glorify Christ in the way we speak, in the way we think and act.
For if you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body, you will live. - Romans 8:13
For those who live according to the flesh set their minds on the things of the flesh, but those who live according to the Spirit set their minds on the things of the Spirit. - Romans 8:5
For all who are led by the Spirit of God are sons of God. - Romans 8:14