Further, since beatitude is a perfect state which satisfies all legitimate desires, each saint knows all others who are blessed, particularly those whom he has known and loved on earth. He knows their state, be they on earth or in purgatory. Thus the founder of an order knows all that concerns his religious family, knows the prayers which his sons address to him. Parents know the spiritual needs of their children who are still in this world. A friend, reaching the end of his course, knows how to facilitate the voyage of friends who address themselves to him. St. Cyprian speaks thus: "All our friends who have arrived wait for us. They desire vividly that we participate in their own beatitude, and are full of solicitude in our regard."
--Reginald Garrigou-Lagrange, Life Everlasting