The saddest symptom about many so-called Christians is the utter absence of anything like conflict and fight against spiritual apathy in their Christianity. They eat, they drink, they dress, they work, they amuse themselves, they get money, they spend money, they go through a brief round of formal religious services once or twice every week. But of the great spiritual warfare - its watchings and strugglings, its agonies and anxieties, its battles and contests - of all things they appear to know nothing at all. Let us take care that this case is not our own.
J. C. RyleWe must cast away everything which hinders us upon our road towards heaven – the lust of the flesh, the lust of the eye and the pride of life; the love of riches, pleasures and honors, the spirit of lukewarmness and carelessness and indifference about the things of God – all must be rooted out and forsaken if we are anxious for the prize. We must mortify the deeds of the body, we must crucify our affections for this world.
J. C. Ryle