Today, Tuesday, is the day to pray the Sorrowful Mysteries of the Holy Rosary. Naturally, we are aware of the sorrows Jesus underwent. And there's the sorrow we feel when we see others suffering or in distress. But there is one sorrow we tend to forget, that we have sinned against God. If we do not repent, we cut ourselves off from God. Hence, this make it the most important sorrow of all sorrows.