“Paul continues…: ‘I will pray with the spirit’ [viz. in tongues]…. ‘I will sing with the spirit’ [viz. in tongues]…. I Corinthians 14:15…. When a believer speaks in tongues, he is either praying or singing or giving thanks to God with his spirit, rather than with his intellect. This is in harmony with Paul’s explanation in I Corinthians 14:2…. When one is praying ‘in the Spirit,’ he is praying or speaking in tongues. Paul uses this term again, in Ephesians 6:18….
“Speaking in tongues…may cause such emotions as rest, peace, quietness, soft inner glow — as well as [alternatively] ecstatic joy…. The intellect relinquishes…its absolute control…. Paul reached a point where he had to bind his intellect…. He had to quit talking in his own language, and quit thinking in his own mind. He simply prayed in tongues. Thus Oral Roberts: The Baptism with the Holy Spirit, Tulsa, 1964, pp. 22f,31,42 cf. p 28.