I hate to brag, but I'm a one-man parade,
Jehova in drag, the church in a dress.
Outside these walls I may be irrelevant,
but here I'm the Old and the New Testament.
You are unlikely to write a more powerful brag than that. But try. Write a stanza or two focused on a talent or body of knowledge you have, then close the poem with an epic brag about it.
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