In night-fighting, then, make much use of signal-fires and drums, and in fighting by day, of flags and banners, as a means of influencing the ears and eyes of your army.

Sun Tzu's quote emphasizes the importance of communication in warfare, particularly regarding the use of visual and auditory signals to organize and motivate troops effectively. During night battles, signal-fires and drums serve as critical tools for relaying commands and updates, while during daylight, flags and banners visually unify the army and can intimidate or confuse the enemy. The essence of this quote lies in the understanding that successful strategy requires more than just physical prowess; it necessitates clear communication and the ability to influence both one's own forces and those of the adversary. The idea is rooted in the principle of ensuring that troops are responsive and cohesive, with a constant flow of information that empowers them on the battlefield. In modern situations, this concept can be seen in various contexts beyond military applications. In business, for instance, effective communication strategies—whether through emails, meetings, or visual presentations—determine how well a team executes its plans. Just as Sun Tzu advised the use of different tools depending on the situation, leaders today must discern the optimal methods of communication that suit their audience and environment. Moreover, in personal relationships, clear and effective communication can prevent misunderstandings and foster stronger connections. Utilizing non-verbal cues (like body language) during in-person interactions or using technology to stay connected in long-distance relationships reflects the adaptability promoted by Sun Tzu. Ultimately, the quote highlights that in any competitive arena, the ability to influence and motivate through strategic communication can be just as vital as the tactics employed. Adaptability, situational awareness, and clear signals remain essential for success, whether on the battlefield, in boardrooms, or at home.