The book of wrath highlights the use of contrast. Try to find out the images of contrast in poetry and understand the thoughts and feelings expressed by these contrasts.
A: Comparison between the past and the present; The first two poems recall the past and express their ambition to resist the enemy; The last two couplets are written now, expressing the poet's feelings: years have passed, and ambitions have not been paid.
Compared with Zhuge Liang, it shows that I am eager to imitate Zhuge Liang's "dedication" and will not give up my ambition to restore the Central Plains until I die.