The Buddha was a unique human being who was self-Enlightened. He had no one whom He could regard as His teacher. Through His own efforts, He practised to perfection the ten supreme qualities of generosity, discipline, renunciation, wisdom, energy, endurance, truthfulness, determination, goodwill and equanimity. Through His mental purification, He opened the doors to all knowledge. He knew all things to be known, cultivated all things to be cultivated, and destroyed all things to be destroyed. Indeed, no other religious teacher was comparable to Him in terms of cultivation and attainment.