To a former Christian

I would give these three scriptures if I had to talk with a former Christian. In John 14:6, it states, Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. Jesus is the only way to salvation. Furthermore, we should not be fascinated by evildoers because the Kingdom of Darkness mimics the Kingdom of Light. Pharoah had his evil wise men copycat Moses, who God sent. In Exodus 7:11, Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments. We should not be fascinated by evil copycat workers. Lastly, what he lacked before God can reveal to him if he believes because he is all powerful. Every good and perfect gift is from above, coming down from the Father of the heavenly lights, who does not change like shifting shadows, James 1:17. Furthermore, the greatest service every performed was Christ dying for our sins and we should modeled him by showing love and spreading the gospel.
Three spirits could be operated here: the spirit of the antichrist, the spirit of error, and seducing spirits. If I could add one more, it will be the spirit of pride.

I agree with the spirits that are in operation and yes, the greatest service ever performed was by Jesus himself. The task would be to get him to accept Christ because it says he believes in God. It didn't say anything about Jesus. However, if he is convinced then great and if not dust the dust off your feet and keep moving.