Corinthians 2 14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know [them], because they are spiritually discerned.
Yet the words relating to Eternal Damnation/punishment are quite clear and they either mean what they say, or they don't. If they don't mean what they say, this is a strange way to get your message across in order 'that none should perish.'