We must always be far-sighted, be prepared for danger in times of peace, maintain strategic strength and patience, and be lenient and meticulous.

The Doctrine of the Mean is written for the subtle, saying: "Therefore, a gentleman respects morality and seeks knowledge, making the subtle, extremely bright and moderate", which means that a gentleman respects moral cultivation and pursues knowledge and learning, reaches a broad realm and studies the subtle, and has insight into everything and pursues the doctrine of the mean.