大方廣圓覺修多羅了義經略疏 2.152

2.152

菩薩因地之時必發度生之願，乘此願力，所生之處更不退轉。心若疲倦，即憶昔願力，以自策勵所為，不是隨情，故云皆依願力。又非希望報恩，亦非愛見之悲，故言清淨。云無始者，同體大悲、稱性大願性本具之，非別新得，但由迷悟有發不發，發即無始。

When bodhisattvas are on the causal ground, they must make vows to save sentient beings. Riding this vow-power, wherever they are born, they never regress. If the mind becomes weary, they immediately recall their past vow-power to encourage themselves; their deeds do not follow personal sentiments; hence it says "all relying on vow-power." Moreover, it does not anticipate repayment of kindness, nor is it compassion of affectionate views; hence it is called "pure." As for "beginningless," identical-essence great compassion and nature-conforming great vows are inherently possessed in the nature itself, not something newly obtained separately. It is only according to delusion or awakening that they are generated or not generated; when generated, they are beginningless.