WHEN you are old and gray and full of sleep And nodding by the fire,

take down this book, And slowly read, and dream of the soft look

Your eyes had once, and of their shadows deep;

How many loved your moments of glad grace,

And loved your beauty with love false or true;

But one man loved the pilgrim soul in you,

And loved the sorrows of your changing face.

And bending down beside the glowing bars,

Murmur, a little sadly, how love fled And paced upon t

he mountains overhead, And hid his face amid a crowd of stars.

William Butler Yeats was an Irish poet and playwright, and one of the foremost figures of 20th century literature.Yeats was born and educated in Dublin, but spent his childhood in County Sligo. He studied poetry in his youth and from an early age was fascinated by both Irish legends and the occult. Those topics feature in the first phase of his work, which lasted roughly until the turn of the 20th century.

The family returned to London in 1887. In 1890, Yeats co-founded the Rhymers' Club with Ernest Rhys, a group of London based poets who met regularly in a Fleet Street tavern to recite their verse. The collective later became known as the "Tragic Generation" and published two anthologies, first in 1892 and again in 1894. He collaborated with Edwin Ellis on the first complete edition of William Blake's works, in the process rediscovering a forgotten poem "Vala, or, the Four Zoas". In a late essay on Shelley, Yeats wrote, "I have re-read Prometheus Unbound... and it seems to me to have an even more certain place than I had thought among the sacred books of the world."