"Scripture lays down no absolute standards. On the one hand, it gives no encouragement to an austere and negative asceticism, for it does not forbid the possession of private property (Acts 5:4), and it commands us to enjoy with gratitude the good gifts of our Creator (e.g., I Tim. 4:1-5; 6:17). … Every Christian should be content with the necessities of life (I Tim. 6:6-8), but every Christian must make his own conscientious decision before God where he draws the line between necessities and luxuries."
— John Stott
Source: The Lausanne Covenant: An Exposition and Commentary (Lausanne Occasional Paper 3, 1975), on paragraph 9