For unrequited love, from Poetry Soup. The rest of the poem may be found here:
from Though She Be Less Severe, He is Still Not Contented and Tranquil at Heart / by Francesco Petrarch (1304–1374)
From time to time less cruelty I trace
In her sweet smile and form divinely fair;
Less clouded doth appear
The heaven of her fine eyes and lovely face.
For mountains and parts of life that appear to be mountains, from A Book of Luminous Things, edited by Czeslaw Milosz.
from Magnificent Peak / by Muso Soseki (1275-1351) translated by W.S. Merwin
From the four directions
you can look up and see it
green and steep and wild.
For four of my very favorite lines in all of poetry, from The Norton Anthology of English Literature, Fourth Edition, 1.
from The Canterbury Tales / by Geoffrey Chaucer (1343-1400)
Whan that April with his showres soote
The droughte of March hath perced to the roote,
And bathed every veine in swich licour,
Of which vertu engendred is the flowr