"Locke, like William Penn, was tolerant; both loved freedom, both cherished truth in sincerity. But Locke kindled the torch of liberty at the fires of tradition; Penn at the living light in the soul. Locke sought truth through the senses and the outward world; Penn looked inward to the divine revelations in every mind. Locke compared the soul to a sheet of white paper, just as Hobbes had compared it to a slate on which time and chance might scrawl their experience. To Penn the soul was an organ which of itself instinctively breathes divine harmonies, like those musical instruments which are so curiously and perfectly formed, that when once set in motion, they of themselves give forth all the melodies designed by the artist that made them. To Locke, conscience is nothing else than our own opinion of our own actions; to Penn, it is the image of God and his oracle in the soul.... In studying the understanding Locke begins with the sources of knowledge; Penn with an inventory of our intellectual treasures.... The system of Locke lends itself to contending factions of the most opposite interests and purposes; the doctrine of Fox and Penn, being but the common creed of humanity, forbids division and insures the highest moral unity. To Locke, happiness is pleasure, and things are good and evil only in reference to pleasure and pain; and to "inquire after the highest good is as absurd as to dispute whether the best relish be in apples, plums or nuts." Penn esteemed happiness to lie in the subjection of the baser instincts to the instinct of Deity in the breast; good and evil to be eternally and always as unlike as truth and falsehood; and the inquiry after the highest good to involve the purpose of existence. Locke says plainly that, but for rewards and punishments beyond the grave, 'it is certainly right to eat and drink, and enjoy what we delight in.' Penn, like Plato and Fenelon, maintained the doctrine so terrible to despots, that God is to be loved for His own sake, and virtue to be practised for its intrinsic loveliness. Locke derives the idea of infinity from the senses, describes it as purely negative, and attributes it to nothing but space, duration and number; Penn derived the idea from the soul, and ascribed it to truth and virtue and God. Locke declares immortality a matter with which reason has nothing to do; and that revealed truth must be sustained by outward signs and visible acts of power; Penn saw truth by its own light and summoned the soul to bear witness to its own glory."