When I came forth this morn I saw
Quite twenty cloudlets in the air;
And then I saw a flock of sheep,
Which told me how these clouds came there.

That flock of sheep, on that green grass,
Well might it lie so still and proud!
Its likeness had been drawn in heaven,
On a blue sky, in silvery cloud.

I gazed me up, I gazed me down,
And swore, though good the likeness was,
'Twas a long way from justice done
To such white wool, such sparkling grass.

William Henry Davies

http://www.poemhunter.com/poem/the-likeness/