Which two words are closest to the theme of this poem in Spring Grass Staining the Steps and Birds Singing and Flowers Scenting? Why?

The words "self" and "empty". This poem comes from Du Fu's famous poem Shu Xiang in Tang Dynasty. The whole poem is full of feelings that Zhuge Liang, the prime minister of Shu, "died after failing to conquer, and the hero shed tears from now on." Zhuge Liang's "Three Kingdoms, divided, has been bound by its great power, and the Eight Pavilions stand in its name", but the green grass behind him reflects the steps, which shows that the ancestral temple lacks management and repairs, and tourists rarely come here. "There are birds chirping happily under the leaves" is the second sentence that Cooper Sensen continued. The oriole is separated by leaves, which shows that the trees are lush; Huang oriole's good voice shows that the mountains and rivers painstakingly built by Wuhou have changed, and things have changed, which has been forgotten by future generations. These two poems contrast the desolation of the ancestral temple, and contain the poet's feelings of thinking about things and people and remembering the sages. At the same time, it also contains the meaning that Bicao and oriole don't understand the change of personnel and dynasties. In particular, the clever use of the words "empty" and "self" in the poem enriches the meaning of this couplet. For these two sentences, some critics of Du Fu's poems think that they are writing about scenery, while others think that they are "really lyrical, not really writing about scenery". These two statements certainly have some truth; However, to be more precise, these two sentences should be regarded as "the language of scenery is full of affection, and the language of affection contains scenery", which is like what Fan said in the book "Talking about Bed at Night" in the Song Dynasty.