首楞嚴義疏注經 9.149

9.149

真修行法，即前二決定義；觀音觀門，內戒、外呪兼前正解，俱是修行入覺之方法也。

The 'method of true cultivation' refers to the earlier two decisive meanings; the gate of contemplation of Avalokiteśvara, the inner precepts, the outer mantra, together with the earlier correct understanding, are all methods for cultivating and entering awakening.