Forgiveness does not mean condoning others evil or unskillful behaviors, but it does mean letting go of the emotion connection of feeling hurt and wounded.
The role of investigation (Dhammavicaya) in opening wisdom, which liberates the mind. a description of the way investigation happens in teacher/retreatant interviews
The practice of mindfulness of the five hindrances can help to understand their impermanence, unsatisfactoriness and impersonal nature and thereby experience freedom