A child’s development depends on BOTH the traits that he/she is born with (Nature) and what he/she experiences (Nurture)
We are all born with a sinful nature. Our experience or lack of experience at the foot of the Cross, on which Jesus dies (John 3:16) to save us from eternal damnation in hell, is what nourishes us.
When we accept, believe, and confess Jesus Christ as LORD and Savior, we are made into a new creation (2 Corinthians 5:17) and our old nature is gone and we walk in (experience) the newness of life.
Without this nourishment, we wont grow and will eventually die. The wages of sin (sinful nature in us) is death, but God’s gift is eternal life through his son, Jesus Christ.