Christmas is the time of year when the pressure to be perfect intensifies. We imagine the perfect celebration and then put forth our best effort to make it happen. We shop for the perfect gifts. We plan the perfect Christmas Day meal. We choose the perfect greeting cards or write the perfect family letter. But our striving leads to discouragement and disappointment when our ability to imagine perfection exceeds our ability to implement it. The carefully chosen gift receives only a halfhearted thank you. Part of the meal is overcooked. We find a typo in our Christmas greeting after we’ve…