context is important. What was Jesus making a reference to? Just did a message on this verse. . .He was calling Christians to be like the healing hot springs of hieriopolis and the cold waters of Colossae. Be a source of refreshment like the cold waters or be a source of healing to people like the hot springs. the warm tepid water is what was found in Laodocia. Of course, this statement is merely political and the extremes are filled with pride and malice towards one another. Spiritual condition is poor in both cases. And yes, we are to have god examine each of us to see if any wicked way is within us. .. and check our planks in our eye before the speck in our brothers. . .