I know thy works; and because they are not what they should be (Revelation 3:16, Revelation 3:17), I give thee this admonition, which is nevertheless a warning and a token of my love (Revelation 3:19).
That thou art neither cold nor hot: I would thou wert cold or hot. The lukewarmness of which the Epistle complains was produced by a fallacious sense of security, begotten of ease and prosperity. In truth those "secure," without care, had become the careless ones.
Active opposition may well be a less deadly evil than careless ease. The persecution of a St. Paul may be diverted into the zeal of an apostle; but how can any active good be got from that which is utterly stagnant and without motive power?
The man who, by wilful action, increases a disease, may repent of his deed, and try to recover from the danger to which he has exposed himself; but he who lives on in careless ignorance of the existence of the malady can never improve himself until he has awoke to a full knowledge of his own state.
Some understand "cold" to mean "untouched by the power of grace," and "lukewarm" to denote those who, having received the grace of God, had not allowed it full scope in bringing forth works meet for repentance (Matthew 3:8).
And just as there was more hope of the real conversion of the "cold" publicans and harlots, who "went into heaven" (Matthew 21:31) before the self-satisfied, "lukewarm" Pharisees, so there is more hope of an unconverted sinner than of him who, having once been roused to a sense of God's will, has relapsed into a state of self satisfied indolence and carelessness.
The sentence is not a wish that the Laodiceans should become hot or cold; it is a regret that they had not been one or the other. Our Lord is not wishing that any of them may become cold, but resetting that, when he comes to review their conduct and to pronounce judgment, many of them cannot even plead that they "knew not the way of righteousness," but belong to that worse class, "which after they had known it, turned from the holy commandment delivered unto them (2 Peter 2:21; see also John 9:41).