Analysis of Art above nature: to julia

When I behold a forest spread
With silken trees upon thy head;
And when I see that other dress
Of flowers set in comeliness;
When I behold another grace
In the ascent of curious lace,
Which, like a pinnacle, doth shew
The top, and the top-gallant too;
Then, when I see thy tresses bound
Into an oval, square, or round,
And knit in knots far more than I.
Can tell by tongue, or True-love tie;
Next, when those lawny films I see
Play with a wild civility;
And all those airy silks to flow,
Alluring me, and tempting so--
I must confess, mine eye and heart
Dotes less on nature than on art.