Overview
The Old Testament prescribes seasons of humiliation and self-affliction as spiritual disciplines that demonstrate sincere contrition and dependence upon God. The Day of Atonement (Yom Kippur) required Israel to "afflict" themselves through fasting and rest. These practices expressed genuine sorrow for sin and earnest intercession before the Lord.
Key Scriptures
"On this day atonement shall be made for you, to cleanse you. You shall be clean before the LORD from all your sins" (Leviticus 16:30, ESV). "On the tenth day of this seventh month you shall afflict yourselves and shall do no work, either the native or the stranger who sojourns among you" (Leviticus 23:27, ESV). "I proclaimed a fast there, at the river Ahava, that we might humble ourselves before our God, to seek from him a safe journey for us, our children, and all our goods" (Ezra 8:21, ESV).
Application
Christians today express humble repentance and earnest seeking of God through prayer, fasting, and confession rather than external rituals, recognizing that Christ's sacrifice supersedes the Old Covenant observances.