It is extremely hard to be an effective witness for Christ when we are lukewarm. As a matter of fact, it actually hurts the church because most non-Christians will see no difference in the lives of Christians from the rest of the world. An important question we should ask ourselves is, "Am I lukewarm?" If my answer to this question is "Yes," then I should be very concerned.
Please watch these two videos. The messages cut right to the point.
"So, because you are lukewarm — neither hot nor cold — I am about to spit you out of my mouth."
Revelation 3:16
Lukewarm (about 40 mins)
Lukewarm Follow-on (about 50 mins)
If you consider yourself a lukewarm Christian, I pray that God would lead you to do whatever you need to do to get on fire for Him. I pray that He would convict your heart to repent and start anew. I also pray that if you are an unbeliever that God would lead you to Christ today. Repent and accept Christ as your personal Lord and Savior. Please don't delay. We never know when the last trumpet will sound.