The cliff is the edge made geological — where the path ends in air and one more step changes everything. Standing at the dream-cliff is standing at a decision with irreversible consequence.
Positive Resonance
The vista from the edge, the decisive point honored
Shadow Aspect
Vertigo of the irreversible, pushed or pulled toward the drop
Nuances
Standing at edge: the irreversible decision near
Backing away: choosing not yet
Cliff crumbling: the safe margin failing
Others at the edge: witnessing another's precipice