Rev 3:15

3:15 neither cold nor hot. Laodicea’s water supply had to be provided from a distant source through pipes. The resulting water was lukewarm and barely drinkable. By contrast, the neighboring town of Hierapolis had medicinal hot springs, and neighboring Colossae was supplied by a cold mountain stream. Christ urges the church to be refreshing (cold) or medicinally healing (hot), rather than like the Laodicean water supply.