The phrase "vigorous attack" refers to a strong, forceful and determined effort or action directed towards something. It implies an aggressive approach in which someone or something is actively engaged in trying to overcome obstacles, achieve goals or confront challenges with energy, enthusiasm and determination. A vigorous attack can be physical, such as in sports when a team employs a strong defense or offense; it can also be mental, such as in the pursuit of an idea or objective with great passion and conviction. In essence, "vigorous attack" is about taking bold and assertive measures to achieve success.