Todd Friel of Wretched Radio does an excellent job on his radio show. The following is a clip of him witnessing on the campus of Georgia Tech.
Todd is correct that the purpose of life has to do with God’s attributes. I use this idea to counter the objection that eternal punishment is unjust. The greatest commandment is the purpose of life: to love God (Matthew 22:37) Those who love God go to be with Him in heaven (John 14:23). In addition, since the penalty for sin has been paid by Jesus (1 Peter 2:24), they are not punished themselves (Romans 8:1). Those who don’t love God must be separated to a place reserved for people who don’t love Him (Revelation 20:15). In addition, since they did not receive a pardon for their sins, they themselves must pay the penalty (2 Peter 2:4).
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Matthew 22:37 And he said to him, “You shall love the Lord your God with all your heart and with all your soul and with all your mind.
God’s purpose in humanity is to create a group of free creatures who can freely choose to love God or reject. If love is a choice and it is a sin to reject God, then God’s only choice would be to make robots incapable of love. But that would defeat His entire purpose of creating humanity in the first place.