There is a part of you that has never been anxious, never been angry, never been lost. It is the part that notices all these states. The yogis called it the Sakshi — the witness.
Most of us live entirely identified with the contents of our experience. We say "I am anxious" rather than "anxiety is present." In that small shift lies an enormous freedom.
The practice of witness consciousness begins simply: sit quietly and notice that you are aware. Not what you are aware of — just the fact of awareness itself.
You cannot see the eye with the eye. But you can know that seeing is happening. That knowing is the witness.
As this capacity develops through meditation, difficult emotions still arise — but they arise in a space that is not threatened by them. Grief comes — and is held. Fear comes — and is witnessed. The witness is never damaged by what it sees.