The Pali tradition mentions two kinds of the Buddha's first words: one corresponds to Dh. 153-4, the other denotes the first three verses of Vin. I (=Ud. 1-3). According to the former, the Buddha, having discovered the craving which makes His own existence in transmigration, destroyed mental defilements and ignorance with which His existence is covered just like with a roof. Then He attained the extinction of the cravings. The latter occurred to Him after having considered dependent origination (paticca-samuppada) through the night under the Bodhi-tree. Here the constituent elements of human existence (dhamma) become clear (open) to the Buddha. Among these elements (dhamma), He realizes the Law (dhamma, Truth) which accompanies the causes and conditions of human existence and He knows the cessation of these causes and conditions as well. These elements (dhamma) may mean the elements (anga) of dependent origination, or 5 aggregates and 6 (or 12) spheres of perception and cognition, etc., which exist when the causes and conditions exist, and which cease to exist when these causes and conditions cease to exist, according to the Law of dependent origination.