...You can't. But you can embrace it. Embrace those feelings of betrayal, and never forget the stinging pain that came from it. Do that, and you'll have the power to stop it from happening ever again. That power will make you the new traitor.

[He can understand Cisco's pain. It's the pain that feels like the whole world has collapsed around you, where everything you ever did was built around a lie. Yet all pain, if overcome, turns into a lesson. A hindsight reminder about what caused the pain, and how to avoid it again. Betrayal is a pain that teaches the victim about the truth, and what trust really means.

Betrayal is what made Eobard into the Reverse Flash. And the pain he suffered turned to hatred, which turned to power.]