"We are like William of Orange, with a few followers and an empty purse, making war against the master of half the world, with the mines of Peru for a treasury. But like William, too, when questioned concerning our resources, we can reply, 'Before we took up this cause we entered into a close alliance with the King of Kings.'" - David Gacey, as quoted in Spurgeon's Sermon Notes
Further recommended reading & listening:
The Best of The Daily Spurgeon
The Forgotten Spurgeon, by Iain Murray
A Defense of Calvinism - by Charles Spurgeon