 When Adam sinned in the garden, Adam and all his posterity, all those born in him became sinners by nature. You aren't a sinner because you sin, you are a sinner, therefore you sin, do you see? You are by nature a sinner, and you got that nature from your first father, Adam. Inheriting that sin nature from Adam, no person sins. Born in him has been able to live a sinless life, and no person can. If you are born in Adam, you are born with a sin nature, and you sin. And not only a sin universal, but the death that is the punishment for that sin is universal as well.