Do you know that you can make God sick, sick to his stomach, so much so that you can make him throw up? The Bible counsels us to not be lukewarm (neither hot nor cold for God), for in being lukewarm, we are ditasteful to him and he will vomit us out of his mouth. In other words, we make God sick by being lukewarm.
Points to ponder:
O taste and see that the Lord is good and blessed in the man/woman that trust in God (Psalm 34:8). But once you have tasted the goodness of God, be not lukewarm, so that he can taste our lives and see that we are good. Imagine for a moment, as to how you would taste in the mouth of God.
Revelation 3:16 (KJV)
16 So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.