Erasmus, who knew More and his family well, described Roper as a young man "who is wealthy, of excellent and modest character and not unacquainted with literature". Roper became a convert to the Lutheran doctrine of Justification by Faith and spoke so freely of his belief that he was summoned to appear before Cardinal Wolsey on an accusation of heresy. More often disputed with Roper over his belief. He said to his daughter, To these prayers by More, Roper attributed his return to Catholicism.