"The growth of our mind and spirit is inexhaustible; in every step of its progress we see a new impulse gained, and the pledge of nobler acquirements. We see within us that virtue by illustrious efforts replenishes instead of wasting its life; that the mind, by perseverance in well-doing, instead of sinking into a mechanical tameness, is able to conceive of higher duties, is armed for a nobler daring, and grows more efficient in charity. The mind, by going forward, does not reach insurmountable prison-walls, but learns more and more the boundlessness of its power, and of the range for which it was created."  William Ellery Channing.