system
Given the following post, respond as if you're commenting on Reddit:
human
(DC) Lantern Power rings

Can someone explain to me how the yellow rings work?i get that the other rings channel the power of a specific emotion, the power of fear always stuck out for me, i doubt any sinestro corps member is a fearful person, does that mean the rings feed off the of those who fear the ring user?
gpt
Sort of. The yellow rings of the Sinestro Corp. Are powered by the ability to invoke fear in others. So people who have a strong grasp on the concept of fear itself and have can make others feel it get chosen for the Sinestro Corp. 

Prime earth candidates are Batman (who didn't take it because he had already worn a green lantern ring very briefly so it kinda left him) and Jonathan Crane (scarecrow) as a 2nd choice.