If you are out there pursuing your goals, overcoming obstacles, and blasting through barriers, there will be times when you take on more than you can handle. You will misjudge situations and, as the saying goes, will "bite off more than you can chew." This is part of the growth process. This applies both professionally and personally. Don't let the opinions of others diminish your focus. Deal with the situation as best you can, and chalk it up to life.