prove (one's) mettle

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prove (one's) mettle

To prove that one has endurance and strength of character, or the necessary skills, abilities, or traits to succeed in something. You may be the youngest lawyer in the firm, but you certainly proved your mettle in that high-profile murder case. The new CEO proved her mettle by completely restructuring the dying mobile phone division into the powerhouse it is today.
See also: mettle, prove
References in periodicals archive ?
Well, dear Camilla, prove your mettle and come and be a guest, I for one would LOVE to meet you.