68 First follow Nature, and your judgment frame
69 By her just standard, which is still the same:
70 Unerring Nature, still divinely bright,
71 One clear, unchang'd, and universal light,
72 Life, force, and beauty, must to all impart,
73 At once the source, and end, and test of art.
74 Art from that fund each just supply provides,
75 Works without show, and without pomp presides:
76 In some fair body thus th'informing soul
77 With spirits feeds, with vigour fills the whole,
78 Each motion guides, and ev'ry nerve sustains;
79 Itself unseen, but in th'effects, remains.
80 There are whom heav'n has blest with store of wit,
81 Yet want as much again to manage it;
82 For wit and judgment ever are at strife,
83 Tho' meant each other's aid, like man and wife.
84 'Tis more to guide, than spur the Muse's steed;
85 Restrain his fury, than provoke his speed;
86 The winged courser, like a gen'rous horse,
87 Shows most true mettle when you check his course.
88 Those Rules of old discover'd, not devis'd,
89 Are nature still, but nature methodiz'd;
90 Nature, like Monarchy, is but restrain'd
91 By the same laws which first herself ordain'd.