I emphasize willingness over willfulness because we are not always in complete control of our emotions. For example, you cannot at this precise moment will yourself not to feel anger. You can distract yourself or engage in “self-talk” to reduce the anger, but you still are not in complete control of your emotions at a given time. Thus, I advocate being open to change, but not to grow discouraged if you still need to work on those emotions that need your attention, such as unhealthy anger or even hatred. Being willing to change is not the same as “willfulness.” The latter suggests that you can will a deliberate alteration now in your emotions. Willingness, on the other hand, while still focused on your free will to be rid of unhealthy emotions, does not expect instant change in these emotions.
For additional information, see: Learning to Forgive Others.