In the eyes of Buddhism, however, this fundamental question is the Fundamental Tool of all tools, and the Standard Implement of implements: it is an all-illuminating Mirror, by which all phenomena of the universe can be perceived; on the other hand, if the Tool is unworkable, or if the Standard Implement lacks accuracy, or if the Mirror is defiled with dust, then the reality of all phenomena and all things would not be correctly perceived. According to Buddhism, the Essence of mind of all sentient beings does not differ from that of Buddha, but like a dirty mirror, its function to shine does not work for the time being, thus it is only by cleaning and polishing that its bright Essence would be reverted to its original purity. All is said in the stupenduous volumes of the Tripitaka is nothing but an elucidation of different ways and means to eliminate various defilements to restore the mind to purity so that in this way the truths of life and the universe may be clearly comprehended. However, the cleaning work is by no means an easy thing to do, for not only we need the tools, but also the Know-How to do it well. Contrary to the conventional misconception that the Buddhas image, the dru, the bell, flowers, pennants etc., are but symbols of superstition, we should realize that all those things and everyone of them are nothing but cleaning tools. Again, one may be seized with a sense of mystery about the odds and ends exhibited at a ritual ceremony of Tantric Buddhism in the monastery, but in Buddhism, there is no mystery at all, for, though its profound theories may not be comprehended by people generally, yet whatever it says of the phenomena and things of the world is based on Wisdom and Reason. If we observe the devotees of the Pure Land Sect zealously reciting the Buddha(chanting the name of Buddha), the serene Chan Buddhists sitting in meditation with one-pointed mindfulness, and devoted monks, nuns and lay Buddhists receiving Discipline and reciting sutras wholeheartedly, then we may realize that all these methods of cultivation aim to accomplish but one thing To Clean The Mind and Keep it Clean. It cannot be too strongly stressed that there is nothing superstitious or mysterious in Buddhism; on the contrary, in Buddhism, every act, every move, and everything, come from the inflow of Purity and Wisdom of Supreme Perfect Enlightenment. Hence, Buddhism is said to be invaluable like the Mori Pearl, illuminating on all sides, but this can be realized only by self-experiencing.