He believed in characteristics of ancient Celts. He also wrote : Celtic Twilight" and the "Secret Rose". On his visit ti Ireland, he met the beautiful Irish patriot Maud Gonne and fell in love with her. For the rest of his life, she inspired him.
Yeats returned to Ireland in 1896. There he joined the playwright, Lady Gregory and they both started the famous "Abbey Theater" in 1904. There , he devoted to production of plays. Among the plays he produced with Maud Gonne were "Cathleen ni Houlihan" and "Deidre" a tragedy in verse.
Later in his life, Yeats wrote some more poems Such as,
"The Wing among the Reeds"
"The Shadowy Waters"
"The Green Helmet"
In this poetry, he dislays how much he loved realistic theory. His later poetry was free from self-consciousness.
As Yeats grew older, he turned to practical politics. However in his old age, he wrote more poetry such as "The Wild Swans" "The Tower" and "The Winding Stair" He wrote most plays merely for the aristocrat society not for the middle class. He received the Nobel Prize in 1923. He died in France in 1939 and was byried in Ireland.