Than all of taste his tongue. Nor ever yet
The melting rainbow's vernal-tinctured hues
To me have shown so pleasing, as when first
The hand of Science pointed out the path
In which the sunbeams, gleaming from the west,
Fall on the watery cloud, whose darksome veil
Involves the orient; and that trickling shower
Piercing through every crystalline convex 110
Of clustering dewdrops to their flight opposed,
Recoil at length where concave all behind
The internal surface of each glassy orb
Repels their forward passage into air;
That thence direct they seek the radiant goal
From which their course began; and, as they strike
In different lines the gazer's obvious eye,
Assume a different lustre, through the brede
Of colours changing from the splendid rose
To the pale violet's dejected hue. 120

Or shall we touch that kind access of joy,
That springs to each fair object, while we trace,
Through all its fabric, Wisdom's artful aim,
Disposing every part, and gaining still,
By means proportion'd, her benignant end?
Speak ye, the pure delight, whose favour'd steps
The lamp of Science through the jealous maze
Of Nature guides, when haply you reveal
Her secret honours: whether in the sky,
The beauteous laws of light, the central powers 130
That wheel the pensile planets round the year;