Desiring to change is okay, but longing for change actually hinders our growth. An important aspect of developing acceptance is learning to avoid craving. Craving is when we long for something, and unfortunately craving can make us very unhappy. One common form of craving is to crave experiencing something different from our current experience. This longing actually creates an unhealthy form of dissatisfaction with what we’re currently experiencing since the flip-side of craving is aversion. Craving and aversion are polar twins. When we crave to be experiencing something different then we reject our current experience.It's from a short article called "Tools for learning acceptance" on the Wildmind site.
Mindfulness involves an attitude of acceptance, which is the opposite of either pushing an experience away or longing for an experience. With mindfulness we’re prepared to take on board how we actually are. This doesn’t mean that we want to stay the way we are at the moment. On the contrary we almost certainly will wish to move on from there, but the first step in moving on is to recognize fully where we are, and to accept it.