Bless my beard
This colloquialism serves to make the poem sound conversational and natural, which is at odds to the rather grave references to ‘the day of resurrection’ and the holy ‘Trinity’.
It also lends an air of experience and wisdom to the poem, beard connoting age. (Which is ironic when you consider just how juvenile the subject matter is — also the fact that Keats died at 25).
On reflection, it sounds a LOT like a mid-life crisis…
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