Like the Eleatics he denies that the senses are an absolute test of truth. "For straitened are the powers that have been shed upon our frames, and many the frets that cross us and defeat our care, and short the span of unsatisfying existence wherein 'tis given us to see. Shortlived as a wreath of smoke men rise and fleet away, persuaded but of that alone which each has chanced to light upon, driven hither and thither, and vainly do they pray to find _the whole_. For this men may not see or hear or grasp with the hand of thought." Yet that there is a kind or degree of knowledge possible for man his next words suggest when he continues: "Thou therefore since hither thou hast been borne, hear, and thou shalt learn so much as 'tis given to mortal thought to reach." Then follows an invocation in true Epic style to the "much-wooed white-armed virgin Muse," wherein he prays that "folly and impurity may be far from the lips of him the teacher, and that sending forth her swift-reined chariot from the shrine of Piety, the Muse may grant him to hear so much as is given to mortal hearing." {61} Then follows a warning uttered by the Muse to her would-be disciple: "Thee the flowers of mortal distinctions shall not seduce to utter in daring of heart more than thou mayest, that thereby thou mightest soar to the highest heights of wisdom. And now behold and see, availing thyself of every device whereby the truth may in each matter be revealed, trusting not more to sight for thy learning than to hearing, nor to hearing with its loud echoings more than to the revelations of the tongue, nor to any one of the many ways whereby there is a path to knowledge. Keep a check on the revelation of the hands also, and apprehend each matter in the way whereby it is made plain to thee." The correction of the one sense by the others, and of all by reason, this Empedocles deemed the surest road to knowledge. He thus endeavoured to hold a middle place between the purely abstract reasoning of the Eleatic philosophy and the unreasoned first guesses of ordinary observation suggested by this or that sense, and chiefly by the eyes. The senses might supply the raw materials of knowledge, unordered, unrelated, nay even chaotic and mutually destructive; but in their contradictions of each other he hoped to find a starting-point for order amidst the seeming chaos; reason should weigh, reason should reject, but reason also should find a residuum of truth. {62} [181]