Imam Hasan and Imam Hussain (pbut) were called, "The Masters of the Youth of Paradise." Even though they were not always young and these two honorable youths lived to the age of adulthood and old age, they were called "The Masters of the Youth." That is, their youthhood should always be a role model before the eyes of the youth of the world. The same is true about the youthhood of the Prophet (pbuh) and the youthhood of Imam Ali (pbuh).
Ayatollah Khamenei
Aug. 7, 2004