Proverbs 31:12

She will do him good and not evil all the days of her life.

The verse describes a wife who is worthy of her husband's full and safe trust. Throughout all the days of her life she acts for his good and never for his harm. She is a faithful and steady companion whose character brings lasting benefit to her husband.

Her lifelong good includes practical competence in domestic duties. That practical care sustains the happiness of the household and equips her to manage and care for her family. For a young man choosing a life companion, the verse means he should seek a woman whose character and influence will strengthen and refine him.