It is therefore not quite in accordance with the life and teaching of the Buddha to regard Buddhism merely as a system of religious doctrines and practices established by the Buddha himself; for it is more than that, and comprises as its most important constituent elements, all the experiences and speculations of the Buddha’s followers especially concerning the personality of their master and his relations to his own doctrine. Buddhism did not come out of the Buddha’s mind fully armed, as did Minerva from Jupiter. The theory of a perfect Buddhism from the beginning is the static view of it, and cuts it short from its continuous and never-ceasing growth. Our religious experience transcends the limitations of time, and its ever-expanding content requires a more vital form which will grow without doing violence to itself. Inasmuch as Buddhism is a living religion and not an historical mummy stuffed with dead and functionless materials, it must be able to absorb and assimilate all that is helpful to its growth. This is the most natural thing for any organism endowed with life. And this life may be traceable under divergent forms and constructions. According to scholars of Pali Buddhism and of the Āgama literature, all that the Buddha taught, as far as his systematic teaching went, seems to be summed up by the Fourfold Noble Truth, the Twelvefold Chain of Causation, the Eightfold Path of Righteous Living, and the doctrine of Non-ego (_Anātman_) and Nirvana. If this was the case, what we call primitive Buddhism was quite a simple affair when its doctrinal aspect alone is considered. There was nothing very promising in these doctrines that would eventually build up a magnificent structure to be known as Buddhism comprising both the Hinayana and the Mahayana. When we wish to understand Buddhism thoroughly, we must dive deep into its bottom where lies its living spirit. Those that are satisfied with a superficial view of its dogmatical aspect are apt to let go the spirit which will truly explain the inner life of Buddhism. To some of the Buddha’s immediate disciples the deeper things in his teachings failed to appeal, or they were not conscious of the real spiritual forces which moved them towards their Master. We must look underneath if we want to come in contact with the ever-growing life-impetus of Buddhism. However great the Buddha was, he could not convert a jackal into a lion, nor could a jackal comprehend the Buddha above his beastly nature. As the later Buddhists state, a Buddha alone understands another Buddha; when our subjective life is not raised to the same level as the Buddha’s, many things that go to make up his inner life escape us; we cannot live in any other world than our own.[f18] Therefore, if the primitive Buddhists read so much in the life of their Master as is recorded in their writings, and no more, this does not prove that everything belonging to the Buddha has thereby been exhausted.