The bliss of man (could pride that blessing find) Is not to act or think beyond mankind; No pow'rs of body or of soul to share, But what his nature and his state can bear. Why has not man a microscopic eye? For this plain reason, man is not a fly. Say what the use, were finer optics giv'n, T' inspect a mite, not comprehend the heav'n? Or touch, if tremblingly alive all o'er, To smart and agonize at ev'ry pore? Or quick effluvia darting through the brain, Die of a rose in aromatic pain? If nature thunder'd in his op'ning ears, And stunn'd him with the music of the spheres, How would he wish that Heav'n had left him still The whisp'ring zephyr, and the purling rill? Who finds not Providence all good and wise, Alike in what it gives, and what denies?Pope. An Essay on Man: Epistle I, VI.