That is an apt parable to our hishtadlus. We have to go about life like that tightrope walker, taking our efforts very seriously, and acting as if the outcome is completely dependent on them. Our attitude has to be, “If I don’t put in the adequate exertion I will fail and fall to the concrete below.” All the while, though, we must know that there is a safety net.
Hashem is there to help and support us, and even more, Hashem completely directs every action in our lives. This is the proper balance we must strike between putting in our own efforts and trusting in Hashem’s close involvement.