If you are scaling the cliff, this augurs a difficult climb either socially or careerwise.
If you reach the top, you’ll succeed.
Standing on the edge of a cliff indicates obstacles ahead that can only be averted by taking risks.
If you jump off the cliff, you’ll choose to take those risks – and if you land safely, all will be will. But if you fall off, you’ll feel you have no choice.
Diving off a cliff, or seeing someone else dive off a cliff, indicates welcoming a challenge.