Scarce visible in joy’s meridian height;

But, downwards as its blaze declining speeds,

The dwarfish shadow to a giant spreads.

Milton.

Pleasures are few, and fewer we enjoy;

Pleasure, like quicksilver, is bright and coy;

We strive to grasp it, with our utmost skill,

Still it eludes us, and it glitters still:

If seized at last, compute your mighty gains;

What is it but rank poison in your veins?