There is one debt that cannot be settled. You can repay a loan, return a favor, even the score in blood — but Valluvar insists that a single act of unsolicited kindness generates an obligation so vast that the entire earth and sky, offered together, would not cover it. This is not hyperbole. It is an accounting system with different rules. The chapter opens by declaring the debt infinite, spends three kurals escalating the terms — timing multiplies value, selflessness multiplies it further, and the grateful heart inflates it beyond all proportion — then pivots sharply from measurement to commandment: never forget, never abandon, carry this debt across seven lifetimes. The final three kurals execute a move no reader expects. Having built an architecture of remembrance, Valluvar suddenly demands that you also become a master of forgetting — every harm erased the instant it arrives, even harm that feels like murder. And the closing couplet slams the door with the most absolute verdict in the Book of Virtue: every other moral failure has an exit. Ingratitude does not.