come into one's own

/K AH1 M IH0 N T UW0 W AH0 N EH0 S OW0 N/
verb
  1. 1

    To reach a stage of development or maturity where one has achieved strength and confidence, economic security, or respect and social acceptance.

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Source: https://en.wiktionary.org/wiki/come%20into%20one's%20own