Fille Friday said:
Turns out he was interested a bit in astrology, clairvoyants.
Oh yeah. The latter portion of his career was very, very odd. But also brilliant. When he finally married, NOT to Maude Gonne, his wife supposedly received visions from ghosts, and in his attempts to contact them, he claimed to receive visions himself. These are documented in his book,
A Vision. This is where he introduced the notion of the gyre, the two cones that represent the motion of history into a single point and then back out every 2000 years. It was this belief that informed what is, arguably, his best poem, "The Second Coming." It's all a little kooky, but it's also quite fascinating.
Turning and turning in the widening gyre
The falcon cannot hear the falconer;
Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world,
The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned;
The best lack all conviction, while the worst
Are full of passionate intensity.
Surely some revelation is at hand;
Surely the Second Coming is at hand.
The Second Coming! Hardly are those words out
When a vast image out of Spiritus Mundi
Troubles my sight: somewhere in the sands of the desert
A shape with lion body and the head of a man,
A gaze blank and pitiless as the sun,
Is moving its slow thighs, while all about it
Reel shadows of the indignant desert birds.
The darkness drops again; but 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?