ייִדישער מחשבֿה אויף צפניה 3:5

Afterwards, reflect on the feeling of shame with which man alone has been endowed. How high is its value! How numerous are its uses and advantages. Were it not for this feeling, men would not show hospitality to strangers. They would not keep their promises, grant favors, show kindness, nor abstain from evil in any way. Many precepts of the Torah are fulfilled only out of shame. A large number of people would not honor their parent if it were not for shame, and certainly would fail to show courtesy to others. They would not restore a lost article to its owner, nor refrain from any transgression. For whoever commits any of the disgraceful acts which we have mentioned, does so only when he has cast off the garment of shame. As Scripture said: "Yea they are not at all ashamed, neither know they how to blush" (Yirmiyahu 6:15), and "The sinner knows no shame" (Tzefania 3:5).