Now I know That twenty centuries of stony sleep Were vexed to nightmare by a rocking cradle, And what rough beast, its hour come round at last, Slouches towards Bethlehem to be born?
O chestnut tree, great rooted blossomer, Are you the leaf, the blossom or the bole? O body swayed to music, O brightening glance, How can we know the dancer from the dance.
Though leaves are many, the root is one; Through all the lying days of my youth I swayed my leaves and flowers in the sun Now I may wither into the truth.
William Butler Yeats (1865 - 1939)
Source: The Green Helmet and Other Poems, 1910. The Coming of Wisdom with Time