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"We must also dethrone mammon. I fear that many - probably most - Western Christians worship the god of materialism. If their behavior is any measure, they care more about accumulating things than obeying God. How else can we explain the fact that Christians living in the riches nation in human history give less and less to the church even though their annual incomes have increased substantially over the last three decades? Surely biblical people would have joyfully given progressively higher percentages of their income to evangelism and social ministry as they moved from unheard of wealth in terms of all earlier periods of history to even greater, more astounding levels of material abundance. Instead, we have doubled the size of our already spacious houses and the capacity of our garages while reducing the percentage of our giving. Long ago Jesus said, 'Where your treasure is, there your heart will be also' (Matt. 6:21). And evangelicals are piling up ever-greater treasures in their huge houses, growing vacation homes, and expanding investments."
--Ron Sider in The Scandal of the Evangelical Conscience, 117.