Buddha, the Word

EXCERPT:
THUS has it been said by the Buddha, the Enlightened One: It is through not understanding, not realizing four things, that I, Disciples, as well as you, had to wander so long through this round of rebirths. And what are these four things? They are the Noble Truth of Suffering, the Noble Truth of the Origin of Suffering, the Noble Truth of the Extinction of Suffering, the Noble Truth of the Path that leads to the Extinction of Suffering.

As long as the absolutely true knowledge and insight as regards these Four Noble Truths was not quite clear in me, so long was I not sure, whether I had won that supreme Enlightenment which is unsurpassed in all the world with its heavenly beings, evil spirits and gods, amongst all the hosts of ascetics and priests, heavenly beings and men. But as soon as the absolutely true knowledge and insight as regards these Four Noble Truths had become perfectly clear in me, there arose in me the assurance that I had won that supreme Enlightenment unsurpassed.