Bro. Noel, 
You write,  "so why do you doubt the experience of another?  

Sometimes I get the impression you regularly doubt other people when they tell you the Holy Spirit never testifies of Himself to them. 

You seem like a downright convicted doubter when someone testifys the Holy Spirit does not speak to them of Himself.  I pray in the Name of the Son,  to God the Father Almighty.  The HS  is there with us in prayer,  but the HS never speaks about himself.   He never draws attention to Himself,  and all three ask me to respect the Holy Spirit.  That dimension  of God only wants to speak of Jesus Christ.  That is my experience,  which is also  confirmed in the Word of God. 

The LORD always and only speaks to 'me through the Holy Spirit'  Believe it. 

He Himself convinced me I have a deceitful, vain,  and untrustworthy heart.  He encourages me constantly  to follow His  example and not speak of Him or myself.