Patience is a form of wisdom. It demonstrates that we understand and accept the fact that sometimes things must unfold in their own time. A child may try to help a butterfly to emerge by breaking open its chrysalis. Usually the butterfly doesn't benefit from this. Any adult knows that the butterfly can only emerge in its own time, that the process cannot be hurried.
In the same way, we cultivate patience toward our own mind and bodies when practicing mindfulness. We intentionally remind ourselves that there is no need to be impatient with ourselves because we find the mind judging all the time, or because we are tense or agitated or frightened or because we have been practicing for some time and nothing positive seems to have happened. We give ourselves room to have these experiences. Why? Because we are having them anyway!
When they come up, they are our reality, they are part of our life unfolding in this moment. So we treat ourselves as well as we would treat the butterfly. Why rush through some moments to get to other, "better" ones? After all, each one is your life in that moment.
Full Catastrophe Living, Jon Kabbat-Zinn PhD, pg 34