can't hold a candle to

The phrase "can't hold a candle to" means that someone or something is not as good, skilled, or capable as another person or thing. It implies that the subject being compared is inferior or less competent in comparison. The phrase originated in the 17th century and refers to the practice of having an assistant hold a candle to provide light while someone else performs a task, such as a skilled craftsman or a surgeon. If the assistant cannot hold the candle effectively, it suggests that they lack the necessary skills or expertise.