"Thinking gives off smoke to prove the existence of fire. A mystic sits inside the burning. There are wonderful shapes in rising smoke that imagination loves to watch. But it's a mistake to leave the fire for that filmy sight. Stay here at the flame's core."

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If it will be an intolerable thing to suffer the heat of fire for a year or a day, or an hour, what will it be to suffer ten thousand times more for ever? What if thou wert to suffer Lawrence 's death, to be roasted upon a gridiron; or to be scraped or pricked to death as other martyrs were; or if thou wert to feed upon toads for a year together? If thou couldst not endure such things as these, how wilt thou endure the eternal flames ?

— Richard Baxter