Repenting of a Serious Sin

A brother asked Abba Poemen: “I have committed a serious sin and I want to repent for three years.” The elder said to him: “It is a long time.” “For a year, then?” said the brother to him, and again the elder said to him: “It is a long time.” They who were present began saying: “How about forty days?” and again he said: “It is a long time,” but he said: “I am telling you that if a person repent with his whole heart and does not go on to commit the sin again, even in three days God will receive him.”

(Abba Poemen, Give Me a Word, p. 229)