From Spurgeon's sermon, "The Joint Heirs and Their Divine Portion" :

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Say not, 'There are giants in the land,' ye are strong enough to smite them. Say not, 'Lutheranism and Popery are mighty.' So they are, but he that is with you is mightier far. As Jonathan of old, with his armor, climbed up the steep place in the cleft of the rock and began to mow down his enemies, so, believer, alone or with your friend, as God has called you, climb up, for verily the possession is yours, and you may take it.

Does that sound like a man who considered the Lutheran Church to be a true church? I find his intolerance refreshing in an age of phony ecumenicalism.