What are the similarities and differences between the two poems "It's easier to see when you are away" and "time was long before I met her, but is longer since we parted"?

Source: the first sentence: The Five Dynasties Li Yu's "Langtaosha Raining outside the curtain"

The rain outside the curtain is gurgling, and the spring is fading. Luo Zhou can't stand the cold. I don't know if I'm a guest in my dream, but I'm greedy for joy in one day.

don't lean on the fence alone, it's infinite, and it's easier to see when it's not. The flowing water is gone, and the spring is gone.

Second sentence: Untitled by Tang Shangyin

time was long before I met her, but is longer since we parted, and the east wind has arisen and a hundred flowers are gone.

and the silk-worms of spring will weave until they die, and every night the candles will weep their wicks away.

mornings in her mirror she sees her hair-cloud changing, yet she dares the chill of moonlight with her evening song.

There are no multiple routes from Pengshan to oh blue-birds, be listening!-Bring me what she says!.

Appreciation of Poems:

*** Similarity: The word "difficult" is used to express the author's depressed mood, and it is hard to see the sad feelings of the old people.

Difference: "It's easy to see when it's different", and the comparison between "difficult" and "easy" reflects the author's nostalgia for the old days. Sadness about the passing of one's own country. The sentence of "time was long before I met her, but is longer since we parted" is a superposition of two "difficulties", and the subjective modality is written from the objective modality. The first "difficulty" refers to the difficulty of meeting each other, and the second difficulty is the uncomfortable feeling in the heart, which is about to get pain separately. The two words "difficult" highlight the inseparable modality and the author's parting pain.