My favorite Piet Hein Grooks..

Nature, it seems, is the popular name,
for milliards and milliards and milliards,
of particles playing their infinite game,
of billiards and billiards and billiards..

Losing one glove
is certainly painful,
but nothing
compared to the pain,
of losing one,
throwing away the other,
and finding
the first one again..

Similarity: Commutative law
No cow's like a horse,
and no horse like a cow,
That's one similarity
Anyhow

More about Piet Hein, More grooks.

Enjoy!!