I would suggest he consider what many charismatics teach, that the gift "various kinds of tongues" is not for everyone, but that the "baptism of the spirit" with evidence of speaking in tongues is for everyone. In John 4 "a well of water spring up to eternal life. vs john 7 "out of your innermost being will flow rivers of living water." Chapter 7 goes on to ay this he spoke of the spirit that was not yet given.
Also,
Acts 2:17-18 (ESV)
17 “‘And in the last days it shall be, God declares, that I will pour out my Spirit on all flesh, and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams;
18 even on my male servants and female servants in those days I will pour out my Spirit, and they shall prophesy.
I could go on and teach what the gift various kinds on tongues does entail and how is is different and goes beyond the baptism of the Holy Spirit. I am not convinced that you dad needs a theological message at all. One might consider why your dad is thinking of switching positions on this. Did something happen? Or is perhaps his church even if Pentecostal is so dead that the Holy Spirit is not moving that much? Less and less charismatics receive the baptism of the Holy Spirit, so the center of gravity has changed a bit in the last couple of decades. Some churches are more open with tongues and have a greater move of the Holy Spirit than others. Such a move includes the demonstration of power and gifts. Conversely, some churches repress the Holy Spirit possibly even grieving the Holy Spirit, and are not comfortable with much exercise of the gifts. So he needs a renewal perhaps, not a pulling back. I am not judging him or any particular church but pointing out practical possibilities. Another possibility is that the neo-charismatics sometimes have some doctrinal differences and some quite frankly are a bit off from what an older Pentecostal was taught. In any church some use of the gifts might be of the flesh, so perhaps he discerns this? So again the church setting might be an issue though for different reasons. Lastly, most talk about the Holy Spirit and various waves throughout history. It is very easy to speak in tongues etc. during such a wave. That wave has waned now but I think it is about to pick up and already has in some places. I pray your dad can find his way to be strengthened in God in whatever manner that God has for him. That he can find fellowship with those that can help him the most and where he can be a giver to them. That especially he can concentrate on loving God and loving others with no impediments. That he would still desire earnestly the spiritual gifts and learn more about the baptism of the Holy Spirit. Hope this helps. God bless.
