A proverb meaning that you must take risks or face danger to gain something—equivalent to "nothing ventured, nothing gained."
新しい事業に挑戦するか迷っている彼に、先輩は『虎穴に入らずんば虎子を得ず』と言った。
To the colleague hesitating about starting a new business, his senior said, 'Nothing ventured, nothing gained.'
祖父はよく『虎穴に入らずんば虎子を得ず』と言って、私を励ましてくれた。
My grandfather often said, 'Nothing ventured, nothing gained,' to encourage me.