This creature is the Pooka. Pay no mind to the shape he wears, for he’s none of his own, and no soul either. Ware him ever, trust him never, but when… - Peter S. Beagle

"The Lady Amalthea beckoned, and the cat wriggled all over, like a dog, but he would not come near... She was offering her open palm to the crook-eared cat, but he stayed where he was, shivering with the desire to go to her"...[later, Molly asked the cat] "Why were you afraid to let her touch you? I saw you. You were afraid of her."
"If she had touched me," he said very softly, "I would have been hers and not my own, not ever again. I wanted her to touch me but I could not let her. No cat will... The price is more than a cat can pay."

Farrell had seen pure white drunkenness before, but not often enough to recognize it at sight. He knew the thing itself, however — the freight train rattling and lurching comically from hilarity to slobbering sorrow, picking up speed as it passed through wild, aimless anger straight on into wild sickness; and then, running smoothly and almost silently now, into a dark place of shaking and sweating and crying, and out again with no warning to where a dazzling snowy light made everything very still.

We give them different names, those nights lit only by fire and the moon, depending on the country and the calendar, but we know what they are. They call up the world that was before the Lord came down among us; the world where good and evil were not so certain, so fixed as they are today, where the known and the unheard-of could mingle as they chose...where truth had its doubts, do you see?
(By Moonlight)