"Christian joy is usually accompanied by a sense of humor. We see this clearly, for example, in St. Thomas More, St. Vincent de Paul and St. Philip Neri.  Ill humor is no sign of holiness. "Remove vexation from your mind" (Eccl 11:10). We receive so much from the Lord 'for our enjoyment' (1 Tim 6:17) that sadness can be a sign of ingratitude. We can get so caught up in ourselves that we are unable to recognize God's gifts." (Pope Francis) We can choose to be joyful or choose to be downcast. In either case our day will be determined by this choice. We can't determine the many circumstances of our day, but we can decide our attitude towards them. When we are joyful in whatever circumstances  we find ourselves in, we are choosing to be open to the grace of God in the present moment. When we are depressed by the circumstances, we can't appreciate the beauty around us, since we are caught up with only the negative. "Rejoice in the Lord always."