According to the Catholic Encyclopedia, Catholic writers have always insisted that such necessity arises (a) from the very nature of repentance as well as (b) from the positive command of God.
Menurut Catholic Encyclopedia, para penulis Katolik selalu menekankan bahwa kebutuhan atau keharusan tersebut timbul: (a) dari hakikat penyesalan itu sendiri serta (b) dari perintah positif Allah.