“The pasuk tells us that when the brothers saw Yosef approaching from afar, they decided right then and there to kill him. But by the time he reached them, the plan had changed, and they ended up selling him.  We learn two things from this:

First, never give up – when all seems lost, one never knows what might happen or how things could change in an instant.

Second, when one comes to a decision in haste, wait a few moments and rethink the issue. You never know how the decision may be altered with a clearer mind.” ~ Ben Ish Chai in Torah Tavlin