It is easy to feel inferior when some Christians believe that they have been baptised with the Holy Spirit and others don’t.
But it is important to remember that nothing can be added to our salvation.
Why is the Holy Spirit given? The answer is found in this verse:
“Because you are sons, God sent the Spirit of His Son into our hearts, the Spirit who calls out, ‘Abba, Father.’” Galations 4:6
Nothing can be added to our salvation, because the result of salvation is becoming God’s son – brought into His family and because of this, God will send His Spirit into our heart.
A transforming event:
But why are some Christians aware of a filling of the Holy Spirit, and others aren’t?
Surely this is a transforming event?
If we know that we are forgiven and are trusting Jesus to save us, but we haven’t had any awareness of being filled, then the problem is generally down to us not knowing spiritual truth.
All spiritual blessings are given objectively and in principle at conversion.
Everyone who is converted (or saved, or born again, whatever the terminology) will be given all the spiritual blessings of being a child of God the Father.
But we only realise this in our experience when the Spirit is poured out.
For example, the disciples believed in Jesus before the day of Pentecost, but when the Spirit was poured out, they were made aware of their sonship, they received God’s seal of ownership * and they became more unmoveable in their faith.
* (This will be covered in article  Different Biblical terms, that describe the filling of the Holy Spirit.)
But nothing had changed their salvation, they believed in Jesus and were saved before Pentecost, now after Pentecost they still believed in Jesus and were still saved.
For many Christians the presence of the Spirit within them is hidden, but that does not mean that the Spirit is not there. It is when we consciously receive the Spirit that we become aware of His workings, His various gifts, and His power.
Objectively and in principle all Christians are ‘in Christ’ and have all that there is in Christ, but in practice and in their experience, some Christians are unaware of the Holy Spirit.