Using the debt snowball plan, why is it easier paying off the second and subsequent debts?

Make least installments on every one of the obligations with the exception of the littlest, and toss as much cash as you can on it. Once that obligation is gone, take its installment and apply it to the following littlest obligation. Rehash that as you drive your way through them. The more you pay off, the more your authorized cash develops-like a snowball moving downhill.