If at times something sad happens

Then when you have done all good things, begin anew as if you had done nothing. If at times something sad happens, something bad, something tedious, something bitter, and certainly if sometimes a good thing happens by chance, then you should immediately look to the crucified Jesus hanging on the cross. Look there at the crown of thorns, the iron nails, the lance in the side; gaze at the wounds in his feet and hands, the wounds to his head, his side and his whole body, and recall that this is what he suffered for you, what he bore for you, so that you may know how much he loved you. Believe me: after gazing in such a way, you will find that everything sad becomes joyful, everything heavy becomes light, everything boring lovable, everything harsh sweet and soothing. 

- Saint Bonaventure