John Gill Bible Commentary

I know thy works,.... Which were far from being perfect, and not so good as those of the former church: that thou art neither cold nor hot; she was not "cold", or without spiritual life, at least in many of her members, as all men by nature are, and carnal professors be; she was alive, but not lively: nor was she wholly without spiritual affections and love; to God, and Christ, to his people, ways, truths, and ordinances; she had love, but the fervency of it was abated: nor was she without spiritual breathings and desires altogether, as dead men are; or without the light and knowledge of the Gospel, and a profession of it, and yet she was not "hot"; her love to God and Christ, and the saints, was not ardent and flaming; it was not like coals of fire, that give most vehement flame, which many waters cannot quench the had not fervency of spirit in the service of the Lord; nor was she zealous for the truths of the Gospel, and for the ordinances of it, and for the house of God and its discipline; nor did she warmly oppose all sin, and every error and false way, I would thou wert cold or hot; which must be understood, not absolutely, but comparatively; and not that it was an indifferent thing to Christ whether she was one or the other; but he alludes to what is natural among men, it being generally more agreeable to have anything entirely hot, or entirely cold, than to be neither; and so uses this phrase to show his detestation of lukewarmness, and that it is better to be ignorant, and not a professor of religion, than to be a vain and carnal one; Christ desires not simply that she might be cold, but that she might be sensible of her need of spiritual heat and fervency.