"In the middle of difficulty lies opportunity." -Albert Einstein
Want to succeed? Want to grow as a person? Well you need to be able to recognize when there is an opportunity in front of you. As one door closes, another opens. You also need to recognize when it is time to walk away. Being able to read a situation and make a decision on your next move without bouncing ideas around is essential to growth. Hesitation leads to delay, delay leads to missed opportunity.
On another note, there will always be new opportunities that pop up. In all likelihood, you are going to miss the first couple that present themselves because it either took you too long to recognize them or you didn't recognize them at all. But, this is where you grow and you learn. Tough times lead to good times as long as you change things around, so if you are going through a tough time right now don't let it compound. Instead, start changing aspects of your life that need it and grow.
SK