Sport isn't real life, but it's the most powerful metaphor for real life that humanity has yet invented.

No wonder electronic hypertexts are a powerful metaphor for him: 'every text', he says, 'should be seen, in its intrinsic mode of functioning, as a hypertext'.

Based on a powerful metaphor of musical space, this theory can be applied to pitch, rhythm and metre, or even timbre.

This highly structured geometrical scheme, called the chahar bagh, became a powerful metaphor for the organization and domestication of the landscape, itself a symbol of political territory.

While on one level the paintings are obviously a response to the emotional turbulence of the war, they are also powerful metaphors for the ever-present, internal human conflict.