The hour glass is an emblem of human life, its days passing like grains of sand through the hour glass. The hour glass brings to mind the relative brevity of life. "Man that is born of a woman is of few days, and full of trouble. He cometh forth like a flower, and is cut down: he fleeth also as a shadow, and continueth not." (Job 14:1, 2) The brevity of life and the rapidity of its passing challenges us, as Horace put it, to "Seize the day, trusting as little as possible to tomorrow" (Latin, Carpe diem quam minimum credula postero). Yet this seizing of each day of our brief lives should be done in a moral way, as indicated by St. Paul, who said, "Watch carefully then how you live, not as foolish persons but as wise, making the most of time, because the days are evil. Therefore, do not continue in ignorance, but try to understand what is the will of the Lord." (Ephesians 5:15-17)
Perseverance is also associated with the hour glass. Perseverance is that quality of resolute endurance that enables us to survive the challenges and crises of human life, especially times when we suffer unjustly. It calls to mind the warning of Jesus to his disciples, "You will be hated by all because of my name. But the one who perseveres to the end will be saved," (Mark 13:13) as well as the words of James, "Blessed are those who persevere under trial, because when they have stood the test, they will receive the crown of life that God has promised to those who love him." (James 1:12)