Once the heart is calm, the outside world is silent.

This sentence means that when our hearts remain calm and stable, all kinds of external interference and noise will become insignificant and have little impact on us. In other words, our inner state determines how we treat and deal with external influences. If we can keep calm and calm, then even if there is more noise and interference outside, we will not be greatly affected. This principle can be applied to various occasions, such as work, study, emotion and so on. Through inner peace and stability, we can better cope with all kinds of challenges and pressures, maintain clear thinking and stable emotions, and thus better accomplish our tasks. Therefore, we should learn to keep inner peace and pay attention to self-cultivation and self-improvement, so as to better control our emotions and behaviors.