 In Paul's letters, "porneia," (a single name for an array of sexual behaviors outside marital intercourse), became a central defining concept of sexual morality, and shunning it, a key sign of choosing to follow Jesus.Sexual morality could be shown by forgoing sex altogether and practicing chastity, remaining virgin, or having sex only within a marriage.Harper indicates this was a transformation in the deep logic of sexual morality as personal rather than social, spiritual rather than merely physical, and for everyone rather than solely for those with status.