The Discloser of the Reality of Kamma
The Lord Buddha had discovered and seen the common and true enemy of all living beings. This common enemy is the evil force behind the scene which uses defilements to control all living beings. Defilements cause human beings to perform deeds or Kamma, the fruits of which cause them to undergo the round of rebirth. The Lord Buddha was able to witness the round of rebirth on the day of His Enlightenment after He attained the Threefold Knowledge.
During the first watch, the Lord Buddha attains the First Knowledge, which is called Pubbenivasanussatinana. It is the supernormal knowledge which enables the Lord Buddha to recall the details of His countless past existences. The First Knowledge is accessible through the Dhamma-Eye. He is able to witness His countless past existences and the conditions of each of these existences ranging from abject poverty to the wealth and power of an absolute monarch. The bones accumulated from all of His countless existences as a human being piled higher than a great mountain. The blood and tears which He had shed in all these existences were greater than all the great oceans combined.
During the second watch, the Lord Buddha attains the Second Knowledge, which is called Cutupapatanana. It is the supernormal knowledge which enables the Lord Buddha to perceive the death and rebirth of other beings through the Dhamma-Eye. The Lord Buddha perceives that each living being's round of rebirth is caused by its overall Kamma. Some are born as animals, Petas, or Asurakayas that lead a life of suffering. Others are born as human beings or celestial beings that are blessed with good looks and lead a life of luxury. This is where the Lord Buddha perceives how each being's unique, overall Kamma causes each being to be uniquely different.
During the last watch, the Lord Buddha attains the Third Knowledge, which is called It is the supernormal Asavakkhayanana. knowledge which enables the Lord Buddha to rid Himself of all defilements and become enlightened as the Lord Buddha. He is the fourth Buddha of this Kappa. The Lord Buddha is omniscient and is the refuge of all living beings. After His Enlightenment and with the deepest compassion for all beings, the Lord Buddha revealed to us that the hereafter exists, and it is our overall Kamma which determines our rebirth in the Hell Realm or in the Celestial Realm. He has told us what Kamma causes us to be reborn in the Hell Realm and what Kamma causes us to be reborn in the Celestial Realm. The Lord Buddha has graciously taught us the whole truth about reality. He had spent the entire twenty Asankheyyas and 100,000 kappas pursuing His Perfections in order to become enlightened as a Buddha and to lead other beings out of the round of rebirth.