大乘起信論裂網疏 6.10

6.10

These are the six perfections; from the very beginning they are practices that accord with tathatā. As for speaking of them as five gates: if one reaches the point after faith is accomplished, then each and every one reaches the other shore; there is no dhyāna that is not wisdom, and no wisdom that is not dhyāna, so there is no harm in speaking of six. Now, for the sake of people who have not yet entered the determinate stage, if calming and contemplation were divided into two gates, there would be no way to tally with the nature of tathatā; therefore, they are combined into one. One should know that the first four gates are auxiliary practices, and the gate of calming and contemplation is the primary practice; the primary and auxiliary practices are cultivated together so as to accomplish the two kinds of adornment—merit and wisdom—and manifest tathatā.