[452] "But that sign (nimitta), Anuruddhas, you must penetrate. I too, Anuruddhas, before my awakening, while still an unawakened bodhisatta, perceived both light and the vision of forms. But before long that light of mine vanished, and the vision of forms. Then, Anuruddhas, it occurred to me: 'What now is the cause, what is the condition, whereby my light vanishes, and the vision of forms?' Then, Anuruddhas, it occurred to me: 'Doubt (vicikicchā) arose in me, and on account of doubt my concentration (samādhi) fell away; when concentration fell away, the light vanished, and the vision of forms. I shall act in such a way that doubt will not arise in me again.'"
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.