Q. If the penalty for sin is spiritual death … How could Jesus’ physical death on the cross then pay for my sins … He didn’t die spiritually … it was the spirit that brought Him back from the death …or am I missing something?
A. I’ve been told that the phrase “Eloi, Eloi, lama sabacthani” (Matt. 27:46) can be interpreted to mean that both the Father and the Holy Spirit had forsaken the Son on the cross. It’s based on the claim that Eloi is a dual form of the word for God. That means it’s neither singular (El) nor plural (Elohim) but refers only to the Father and the Holy Spirit. If so, this would mean that Jesus did die a brief spiritual death. It could also explain why some of the observers misunderstood and thought He was calling Elijah (Matt. 27:47).
According to 1 Peter 3:18-20, after Jesus died the Holy Spirit came back to Him and enabled Him to preach to the disobedient spirits in prison. I believe this is a reference to the angels who illegally took on human form to produce hybrid offspring with human women in the days of Noah (Genesis 6:4). Both Peter (2 Peter 2:4) and Jude (Jude 1:6) speak of this.
According to Ephesians 1:18-20 it was God Himself who raised Jesus from the dead, returning Him to physical form for His 40 day post resurrection sojourn on Earth.