When you are moving through life and wondering why certain things happen to you, stop and think about the positives that come with, before, or after the negatives. These can often be complementary. If you have experienced great love, you may also experience great loss, if you have had extreme happiness, you may also have felt deep sadness. The negative feelings don't have to overwhelm you and bring you down. Remember they are connected to the positive feelings and without one you can't fully appreciate the other.
So, while you are wallowing in the negative, know that maybe around the corner there will be something positive, and when you are experiencing great positivity, stop to be grateful and appreciative for what you have.