He told the caller he could see his words.

他告诉打电话的人他能够看到他的话
And you said he acted like he was hallucinating?

你还说他看起来像是出现了幻觉
I think I might know what's wrong with him.

我可能知道他是怎么回事了
He has synesthesia.

他有"联感"能力
It's a neurological phenomenon

是一种神经现象
in which two or more senses are triggered simultaneously.

会导致两种及以上感官被同时触发
For instance, someone might associate specific numbers with colors

比如有人会把特定的数字和颜色联系起来
or even be able to taste music.

甚至能够尝到音乐的味道
I think Carl has the form of synesthesia

我认为卡尔的联感能力就是
in which he can literally see the words that people are speaking.

当人们在说话时他能看见那些文字
Hence the message he left

因此他留下了信息
"Hear your evil, see your evil."

"听汝之恶见汝之恶"