摩訶止觀 6.168

6.168

○二、修中觀因緣者，略為五：一、為無緣慈悲，二、滿弘誓願，三、求佛智慧，四、學大方便，五、修牢強精進。

Second, the causes and conditions for cultivating the middle contemplation are briefly five: first, for the sake of unconditioned benevolence and compassion; second, to fulfill the vast vows; third, to seek the Buddha's wisdom; fourth, to learn the great skillful means; fifth, to cultivate unshakeable vigor.