We assume that there is an external world of objects to which our bodies belong. But, if that world exists, is our picture of it correct? We cannot say, for we cannot transcend human limitations. Are our scientific laws accurate? Probably not: they correspond, however, to humanity's present state of mental development. Can we say that our ethical standards and the commands by which we seek to

Are then our scientific laws and our ethical principles of no value? By no means. They are approximations to truth, nearer than those which were reached in the past and later modified or even discarded by the growing wisdom of the race.