Taking the bull by the horns
果敢に断固として物事に取り組む
困難な状況でも恐れずに立ち向かう
He took the bull by the horns and improved the harrassing environment at work.
彼が果敢に取り組んだおかげで職場での嫌がらせが蔓延る環境が改善した。
Are you taking a drama class? You are taking the bull by the horns!
演劇のクラスを取っているの?勇気あるねぇ!