An eminent Chinese Buddhist scholar, well known as Ten Dai Dai Shi (A.D. 538-597), arranged the whole preachings of Shakya Muni in a chronological order in accordance with his own religious theory, and observed that there were the Five Periods in the career of the Buddha as a religious teacher. He tried to explain away all the discrepancies and contradictions, with which the Sacred Books are encumbered, by arranging the Sutras in a line of development. His elucidation was so minute and clear, and his metaphysical reasonings so acute and captivating, that his opinion was universally accepted as an historical truth, not merely by the Chinese, but also by the Japanese Mahayanists. We shall briefly state here the so-called Five Periods. Shakya Muni attained to Buddhaship in his thirtieth year, and sat motionless for seven days under the Bodhi tree, absorbed in deep meditation, enjoying the first bliss of his Enlightenment. In the second week he preached his Dharma to the innumerable multitude of Bodhisattvas,[FN#112] celestial beings, and deities in the nine assemblies held at seven different places. This is the origin of a famous Mahayana book entitled Buddhavatamsaka-mahavaipulya-sutra. In this book the Buddha set forth his profound Law just as it was discovered by his highly Enlightened mind, without considering the mental states of his hearers. Consequently the ordinary hearers (or the Buddha's immediate disciples) could not understand the doctrine, and sat stupefied as if they were 'deaf and dumb,' while the great Bodhisattvas fully understood and realized the doctrine. This is called the first period, which lasted only two or three[FN#113] weeks. [FN#112] Bodhisattva is an imaginary personage, or ideal saint, superior to Arhat, or the highest saint of Hinayanism. The term 'Bodhisattva' was first applied to the Buddha before his Enlightenment, and afterwards was adopted by Mahayanists to mean the adherent of Mahayanism in contradistinction with the Cravaka or hearers of Hinayanism. [FN#113] Bodhiruci says to the effect that the preachings in the first five assemblies were made in the first week, and the rest were delivered in the second week. Nagarjuna says that the Buddha spoke no word for fifty-seven days after his Enlightenment. It is said in Saddharma-pundarika-sutra that after three weeks the Buddha preached at Varanasi, and it says nothing respecting Avatamsaka-sutra. Though there are divers opinions about the Buddha's first sermon and its date, all traditions agree in this that he spent some time in meditation, and then delivered the first sermon to the five ascetics at Varanasi.