1 That our friend Sebesius has profited by your advice I have learned less from your letter than from his own penitence. And strange to say the pleasure which he has given me since his rebuke is greater than the pain he caused me from his previous waywardness. There has been indeed a conflict between indulgence in the father, and affection in the son; while the former is anxious to forget the past, the latter is eager to promise dutiful behaviour in the future. Accordingly you and I must equally rejoice, you because you have successfully put a pupil to the test, I because I have received a son again.
Source: Letters (New Advent)