Why Thirty-Nine
Chazal reduced the lashes from forty to thirty-nine so that a person never feels he has done enough.
A teaching ofRav Dovid Moshe Freidman of Chortkovהרב דוד משה בן ישראל פרידמאןProfile ›
Rav Yechiel Meir of Ostrovtza related that he was once made to wait outside the Rebbe's room, which was unusual. He feared that he had sinned, and he began to imagine what it would be to receive lashes. Then the door opened, and the Rebbe asked him why Chazal deducted one lash from the forty written in the Torah. The Rebbe explained that a person must always know that he can never do enough for his Creator. If a sinner received the full forty, he might feel that he was entirely cleared, and his teshuvah would end. The missing lash keeps the account open, so that a person goes on returning. In this teaching, teshuvah is not a debt that is finally paid, but a direction in which one keeps walking.
Source: Deiah veDibur, "Kodshei Kodshim: The Chortkover Rebbe, Reb Dovid Moshe Friedman zt"l", Part III (9 Marcheshvan 5783), as related by Rav Yechiel Meir of Ostrovtza
Choose one area where you have already done a lot, such as davening, kindness or learning, and ask honestly what one more step would look like. Do not turn this into a reason for discouragement. The point is that growth never reaches an end, and that this is a gift. Today, add one small thing to what you already do, and let it remind you that you are always being invited to come a little closer.