What are the implications and richness of ancient poetry?

Personally, I think it is manifested in expressing feelings by borrowing things, expressing feelings with emotions, expressing my feelings in the scenery with images that I don't understand in different scenes, and expressing the feelings of the whole article with one word. At the same time, there are feelings that can only be understood but can't be expressed, such as maple leaves, acacia sent by brocade books, yearning for the bright moon, flowing water in small bridges, desolate old vines, sad fallen flowers, strong arms and horses, and so on! Implication lies in not saying it directly but having its profound meaning, and richness lies in diversity!