He has taken the law into his own hands.

He takes the law into his own hands and seeks revenge on his own.

He decided to take the law into his own hands and confront the thief himself.

She has taken matters into her own hands and started her own business.

She managed to lift herself up by her bootstraps and achieve success.

She managed to raise herself up by her bootstraps and become a successful entrepreneur.

One bad turn deserves another.

She hid her light under a bushel.

She never hid her light under a bushel.

She is hiding her light under a bushel.