Darmok

I just recalled an episode of Star Trek when Picard encounters an alien species that talks only in metaphores. I can't seem to point what makes this episode so memorable for me, but when I searched the internet I found out that people think it is the best episode ever. Here are some quotes:

"Darmok and Jalad at Tanagra" (meaning working together against a common enemy)
"Shaka, when the walls fell." (meaning failure)
"Temba, his arms wide." (gift, or to give)
"Temba, at rest." (refusing a gift or offer)
"Mirab, his sails unfurled" (travel or departure)
"Khidir beneath Momouteh" (cluelessness, possibly unwillingness to understand)
"Sokath, his eyes uncovered" (understanding, revealing truth)
"Zinda, his face black, his eyes red" (war, violence)
"The river Temarc, in winter" (Stop, cease)
"Kiazi's children, their faces wet" (death, mourning)
"Kalimash at Baha" (storytelling)
"Uzani, his army with fists open" (to lure the enemy in) — "...with fists closed" (to attack)
"Picard and Dathon at El-Adrel" (a new metaphor added to the language at the end of the incident with a meaning similar to "Darmok and Jalad at Tanagra)
"Gilgamesh and Enkidu at Uruk" (Picard's metaphor about ancient Babylonian legends from Earth)
"Ri and Jiri at Lunga. Ri of Luwani, Luwani under two moons. Jiri, of Umbaya. Umbaya of crossed roads, at Lunga. Lunga, her sky grey" (greeting)
"Callimas at Bahar." (Don't worry, calm down)
"Darmok on the ocean." (Alone)