The ability to keep working when faced with obstacles that impede progress toward a goal is

The ability to keep working when faced with obstacles that impede progress towards a goal is essential in order to achieve the set goal.

Explanation :

When a person is determined towards the fulfillment of a set goal, any hindrances in the due course of progression towards the goal do not prove to be big enough to stop the person from reaching the goal.

This ability of the person refers to his skills in coming over the obstacles and consistently keep moving ahead.

yes, since there is a positive and a negetive if the positive and negitive wasn't there wouldn't a flow electricity in it.