Poetry on the tube

On my way home I've just seen this poem by Siegfried Sassoon on the tube and fell in love with it straight away...

EVERYONE SANG

Everyone suddenly burst out singing;
And I was filled with such delight
As prisoned birds must find in freedom,
Winging wildly across the white
Orchards and dark-green fields; on - on - and out of sight.

Everyone's voice was suddenly lifted;
And beauty came like the setting sun:
My heart was shaken with tears; and horror
Drifted away ... O, but Everyone
Was a bird; and the song was wordless; the singing will
never be done.