I believe and trust in what the Holy Spirit and the Word of God through Jesus and the Apostles say.
Not man made doctrines and man made teaching systems that have corrupted the word of God since the 4th century.
Once again to make John 3:16, 3:36, and 6:47 something other than an immediate mental possession is to take and make Jesus words contradict with Apostle Paul and Peter's teachings that salvation is the ending result of our faith that we seek and hope to receive.
So either Jesus was right and Peter and Paul were wrong, or all three were right which means eternal life/salvation being ours now is in an immediate mental assurance state.
Or you interpretation is flawed...that is what I will go with....NO where is it equated to a MENTAL assurance....RIGHT NOW a BELIEVER is a CHILD of GOD...it is the spirit that has BEEN BORN AGAIN by faith......it is NOT something that is YET future....it is a CURRENT possession as OUR spirit bears witness with the HOLY SPIRIT that I AM a SON of GOD by birth.....so..at the end of the day your view is flawed and lacking any substance and or believability!