We have been at great pains to make our text clear, simple, and direct; but we have earnestly sought to stretch the intellects of our readers—to put them upon their mettle.

我们一直在竭尽全力使我们的文字清晰、简单和直接；但我们一直在认真地寻求扩展读者的智力——激发他们的勇气。