Here are two different quotes from WB Yeats about Ulysses:
1. He read a chapter or two of Ulysses, which had been serialized in the Little Review from Paris. His first comment was: “A mad book!”
2. Not too long after making that first comment, Yeats had this to say, “I have made a terrible mistake. It is a work perhaps of genius. I now perceive its coherence … It is an entirely new thing — neither what the eye sees nor the ear hears, but what the rambling mind thinks and imagines from moment to moment. He has certainly surpassed in intensity any novelist of our time.”