GUIDED MEDITATION: Don't Suppress, but Acknowledge & Let Go
Letting go is radically different from suppression, denial or displacement. In his guided meditation, Ajahn Dhammasiha encourages us to acknowledge whatever arises in out mind, even if it's negative and challanging emotions or memories. If we just deny and suppress them, they will never be resolved, but just get pushed into the unconscious part of our mind, and wil later surface again - potentially even manifesting as neurosis.
We have to look at even the unpleasant, negative emotions with conscious awareness, so that we can investigate them mindfully and understand them with proper wisdom. Once they are seen wisely as impermanent and not truly me or belonging to me, only then can we let go of them.