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Vanity is the natural weakness of an ambitious man, which exposes him to the secret scorn and derision of those he converses with, and ruins the character he is so industrious to advance by it.

Joseph Addison, Richard Hurd, Henry George Bohn (1872). “The Works of the Right Honourable Joseph Addison”, p.158
Vanity is the natural weakness of an ambitious man, which exposes him to the secret scorn and derision of those he converses with, and ruins the character he is so industrious to advance by it.