The book of Revelation clearly describes the state of the end times church (Laodicea) as "lukewarm".

So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.
- Revelation 3:16 (KJV)

One foot in God's kingdom, and one foot in the world.

Check out this YouTube video which challenges you to make a decision one way or the other.

And Elijah came unto all the people, and said, How long halt ye between two opinions? if the Lord be God, follow him: but if Baal, then follow him. And the people answered him not a word.
- 1 Kings 18:21 (KJV)

Who do you follow?