"Oil is essential for a modern, industrial society. It's unique, first of all, because it's the primary source, at 40 percent, of the world's entire supply of energy, and it's irreplaceable in the transportation field; it provides 98 percent of world transportation energy."

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The first essential for the coming of the Holy Ghost into a heart today is that the heart should be cleansed from sin, for the Holy Spirit does not fill an unclean heart. What God has cleansed, He then fills. Finally, whom God fills, He uses. A holy life is the authentic sign of being filled with the Spirit.

— Leonard Ravenhill