四分律行事鈔資持記 2.1563

2.1563

七中。煩惱重處，為善者希；復由苦逼，心必猛盛，所以獨勝；餘二弱者，煩惱輕故。北洲難地，故所不論。經云：南洲一日一夜發心修行，勝東西二洲五十小劫，是也。

In the seventh: Where afflictions are heavy, those who do good are rare; furthermore, driven by suffering, their minds must be vigorous, which is why [this continent] alone is superior; the other two are weak because afflictions are light. The Northern Continent is a place of difficulty, so it is not discussed. The sūtra says: 'A single day and night of generating the mind and cultivating practice in the Southern Continent surpasses fifty small kalpas in the Eastern and Western Continents'; this is what it means.