The Quakers believe, in the first place, that the Spirit of God, acting in man, is one of the wises of virtuous character. They believe it to be, of all others, the purest and sublimest source. It is that spring, they conceive, to good action, and of course to exalted character, in which man can have none but a passive concern. It is neither hereditary nor factitious. It can neither be perpetuated in generation by the father to the child, nor be given by human art. It is considered by the Quakers as the great and distinguishing mark of their calling. Neither dress, nor language, nor peculiar customs, constitute the Quaker, but the spiritual knowledge which he possesses. Hence all pious men may be said to have been Quakers. Hence the patriarchs were Quakers, that is, because they professed to be led by the Spirit of God. Hence the Apostles and primitive Christians were Quakers. Hence the virtuous among the Heathens, who knew nothing of Christianity, were Quakers also. Hence Socrates may be ranked in profession with the members of this society. He believed in the agency of the Divine Spirit. It was said of him, "that he had the guide of his life within him; that this spirit furnished him with divine knowledge; and that it often impelled him to address and exhort the people." Justin the Martyr had no scruple in calling both Socrates and Heraclitus Christians, though they lived long before Christ; "for all such as these, says he, who lived according to the divine word within them, and which word was in all men, were Christians." Hence also, since the introduction of Christianity, many of our own countrymen have been Quakers, though undistinguished by the exterior marks of dress or language. Among these we may reckon the great and venerable Milton. His works are full of the sentiments of[32] Quakerism. And hence, in other countries and in other ages, there have been men, who might be called Quakers, though the word Quakerism was unknown. [Footnote 32: Milton not only considered the Spirit of God as a divine teacher, but that the scriptures were not to be spiritually understood but by the means of this spirit. He believed also, that human learning was not necessary for the qualification of a minister of the Gospel. And he wrote an essay against tithes.]