"I know your deeds, that you are neither cold nor hot. I wish you were either one or the other! So, because you are lukewarm—neither hot nor cold—I am about to spit you out of my mouth."
I have heard these words preached twice in my life. The first time I was a teenager in Catholic Mass and the message went something like this, "God wants you to be so completely for Him or completely against Him. Those who are lukewarm he will vomit out of his mouth (i.e. reject as something vile)." I said to myself, "If God is this divisive, then I will be against him. I do not know him well enough to be for him."
The second time I heard the message, I was a young man who had just received Christ in college and joined a new church. It went like this, "God wants you to be useful. Cold water is good for some things and hot water is good for others, but there really is no use for lukewarm water." The message was healing. It was gospel. This is the difference in proper study of God's word.
So my friends, be careful of every single word you say. Think theologically. Think about what exactly it is you are saying about God lest you speak lies and slander His holy name by which you are saved. You never know who might be listening lest you cause one of these little ones to stumble.