In the realm of MLP fanfic, 'past sins' could imply a whole host of things. It could be that the story focuses on a particular pony who has committed some sort of moral wrong in the past. For example, it might be a story about a pony who was once greedy and took more than their fair share of resources in Equestria. This led to problems for other ponies, and now the story could be about how they are dealing with the consequences of their actions. It could also be about a pony who was unkind or judgmental in the past and is now trying to make amends. The fanfic would likely explore themes of forgiveness, growth, and the power of friendship to overcome past mistakes.
Well, without having read the specific 'past sins mlp fanfic', it's hard to say precisely. However, generally in MLP fanfics, they often take the known characters and settings and add new storylines. So this one might be about a character's hidden past, perhaps a dark secret that they've been carrying. It could be related to things like broken friendships, betrayals, or actions that go against the values of Equestria. Maybe it's about a pony trying to atone for their past sins and find redemption in the eyes of their friends and the community.
A practical answer is Chapter 140, because it turns the idea into a concrete scene. The chapter opens with In the evening, the setting sun was like blood, dyeing the entire earth a..., adds pressure through The Master should come to our place, she helped predict my child's future..., and ends on I.
Look to Chapter 83 for the clearest answer. It begins with When they received the task, the three of them were already sharpening..., keeps building through He Yun had originally wanted to try making braised fish under Jiang Li's..., and lands on Since all the guests were staying at Uncle Zhao's.
Chapter 92 is the strongest chapter-level answer because it starts from Jiang Li, lightened from any task, had plucked a few leaves from the... and follows through on Finally, someone entrenched in the circle couldn't hold back and sent a....
Look to Chapter 121 for the clearest answer. It begins with Seeing that Wen Jiaojiao's condition had improved significantly, Director..., keeps building through A doctor, donned in a white coat, hurriedly got out and immediately asked..., and lands on You're supposed to be a man who conquers.
Look to Chapter 80 for the clearest answer. It begins with Jiang Yan and Wen Jiaojiao, one so smug he was almost ascending to the..., keeps building through And this was exactly the scene Director Sun wanted to see., and lands on arrogant princess with Princess Disease, I'm totally for it, fam.].
If you want the clearest chapter reference, go to Chapter 122. Early on, Damn, are we supposed to find the points card in the mud?!" He had just...; later, the chapter leans on To salvage his image, he had deliberately dressed up before leaving the....
If you want the clearest chapter reference, go to Chapter 87. Early on, Luckily, at that time, Jiang Li had already taken her pot of stinky...; later, the chapter leans on But all this still didn't escape the high-definition camera..
If you want the clearest chapter reference, go to Chapter 103. Early on, Jiang Yan looked at Zhao Lang with suspicion, eyeing the dark substance in...; later, the chapter leans on It's not going to make my face fester, is it?" Zhao Lang smiled, "Do I....
The best chapter pointer here is Chapter 66, "This Sister Really Can Hustle!". It opens with I can't take it anymore, why did the young master even find a pair of... and closes on Unable to find a staff member to notify, and not wanting to waste time for....
Chapter 80 is the strongest chapter-level answer because it starts from Jiang Yan and Wen Jiaojiao, one so smug he was almost ascending to the... and follows through on arrogant princess with Princess Disease, I'm totally for it, fam.] [Hahaha....