Yet the Buddha and Christ are alike in points which are of considerable human interest, though they are not those emphasized by the Churches. Neither appears to have had much taste for theology or metaphysics. Christ ignored them: the Buddha said categorically that such speculations are vain. Indeed it is probably a general law in religions that the theological phase does not begin until the second generation, when the successors of the founder try to interpret and harmonize his words. He himself sees clearly and says plainly what mankind ought to do. Neither the Buddha, nor Christ, nor Mohammed cared for much beyond this, and such of their sayings as have reference to the whence, the whither and the why of the universe are obscure precisely because these questions do not fall within the field of religious genius and receive no illumination from its light. Argumentative as the Buddhist suttas are, their aim is strictly practical, even when their language appears scholastic, and the burden of all their ratiocination is the same and very simple. Men are unhappy because of their foolish desires: to become happy they must make themselves a new heart and will and, perhaps the Buddha would have added, new eyes. Neither the Buddha nor Christ thought it worth while to write anything and both of them ignored ceremonial and sacerdotal codes in a way which must have astounded their contemporaries. The law-books and sacrifices to which Brahmans and Pharisees devoted time and study are simply left on one side. The former are replaced by injunctions to cultivate a good habit of mind, such as is exemplified in the Eightfold Path and the Beatitudes, the latter by some observances of extreme simplicity, such as the Pâtimokkha and the Lord's Prayer. In both cases subsequent generations felt that the provision made by the Founders was inadequate and the Buddhist and Christian Churches have multiplied ceremonies which, though not altogether unedifying, would certainly have astonished Gotama and Christ.