'Hot' in the Bible

There was a lot of whispered discussion and murmuring among the crowds about Him. Some were saying, “He is a good man”; others said, “No, on the contrary, He misleads the people [giving them false ideas].”

‘I know your deeds, that you are neither cold (invigorating, refreshing) nor hot (healing, therapeutic); I wish that you were cold or hot.

So because you are lukewarm (spiritually useless), and neither hot nor cold, I will vomit you out of My mouth [rejecting you with disgust].