Kathryn Kuhlman accented this concept in other places. She didn't mention it in this talk but the scripture she basis this teaching on is 1 Thessalonians 5:23 which says "Now may the God of peace Himself sanctify you completely; and may your whole spirit, soul, and body be preserved blameless at the coming of our Lord Jesus Christ."
Two other talks where Kathryn emphasizes the trinity of man are Body Soul and Spirit part 1 https://youtu.be/5g4b77gbYSo?si=N0BTCrDU8cYGPUQP
and Body Soul and Spirit part 2 https://youtu.be/VGl4C7X960U?si=RjWutWLZ2FPzyRtM
This show has helped me to become more like Jesus and I am sure it can do the same for you. The podcast never has any AI and rarely has music or commentary. I give a short introduction sometimes but Kathryn's talks are unchanged. Take care and God bless.