CentrifugalThe complete utterance is as follows. I was within and without,simultaneously enchanted and repelled by the inexhaustible variety of life.
I was at once in and out of it, both intoxicated and deeply disgusted by the strangeness of life. I think the mood of this sentence should express doubt and uneasiness about the current situation. The Great Gatsby's expression is that although he is living a rich life of extravagance, he can't help but feel doubt.