15 - I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot.
16 - So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.
These verses are concerning the works of “the church of the Laodiceans”.
I have heard two teachings concerning these verses, but both agree that being lukewarm is not where one who claims to be a Christian should find themselves.
 I have heard it said (summarized to my understanding) to be [hot] is to be on fire for God with a witnessing testimony, to be [cold] is to basically act as a lost person with no testimony, and to be [lukewarm] is to be wishy-washy with a hypocrite testimony that neither helps other Christians nor leads the lost world to Christ. The objection (I have heard) to this is that why would God want a Christian to be cold, as the phrase “I would thou wert cold or hot” is used in verse 15.
 I have heard it said (summarized to my understanding) to be [hot] or [cold] is to be useful to God (as water is useful in both states) as a good testimony. To be [lukewarm] again is to be no good for service but to bring reproach to the name of Christ.
How are we in the sight of God with our prayer, study, witness, and living?
How do we see ourselves today, right now: hot, cold, or lukewarm