There's no letting go without faith -
When people talk about faith, they are usually thinking about faith in god, faith in the future, faith in oneself, etc. Rarely do they think of faith in others.
But, faith in others is very crucial to letting go. If one wants to experience true freedom, one has to have faith in others. If there's one thing that we have
Letting go is also dispossesion - meaning, dispossesing things, position, people, aspirations, etc. even including our enemies, if psychologically.