a life of its own

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a life of its own

The state of something that exists and thrives outside and beyond the control of the point of origin. An urban legend can have a life of its own, changing every time it is retold. The accusations in the political race began to take on a life of their own, growing meaner and more elaborate every day.
See also: life, of
References in classic literature ?
It has been easy to live with them, because they're simply leading a life of their own.
Another reproduced the most singular combinations with a spinning-top; in his hands the revolving tops seemed to be animated with a life of their own in their interminable whirling; they ran over pipe-stems, the edges of sabres, wires and even hairs stretched across the stage; they turned around on the edges of large glasses, crossed bamboo ladders, dispersed into all the corners, and produced strange musical effects by the combination of their various pitches of tone.