"If I tell you I'm good, probably you will say I'm boasting. But if I tell you I'm not good, you'll know I'm lying."

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We are truth-speakers, we men of Gondor. We boast seldom, and then perform, or die in the attempt. "Not if I found it on the highway would I take it," I said. Even if I were such a man as to desire this thing, and even though I knew not clearly what this thing was when I spoke, still I should take those words as a vow, and be held by them.

— J. R. R. Tolkien