A number of mystics believe that the month of Rabi Al-Awwal is the spring of life in the real sense of the word because in this month the Holy Prophet (PBUH) and also his honorable grandson, Imam Abu Abdullah Ja’far ibn Muhammad Al-Sadiq (AS) were born. And the birthday of the Holy Prophet (PBUH) is the beginning of all the blessings that Allah (SWT) the Exalted has bestowed on humanity. We, who consider Islam as a tool for humanity to achieve happiness and salvation – [should know that] this divine blessing is because of the Holy Prophet (PBUH) which has been bestowed on us in this month. In fact, we should consider this great birthday as the beginning of all the blessings with which Allah (SWT) the Exalted honored the human community, the Islamic Ummah and the followers of truth.
It is not enough to merely celebrate this birthday anniversary. We should primarily strengthen our spiritual relationship with the Holy Prophet (PBUH). The world of Islam should strengthen its spiritual and emotional relationship with the Holy Prophet (PBUH) on a daily basis. This is the common ground between all the Muslims throughout the world. Those whose hearts beat for the formation of the Islamic Ummah should rely on this issue: the spiritual and emotional relationship with the Holy Prophet (PBUH). That is to say, they should primarily make a serious decision to follow this great personality in all the issues.
Ayatollah Khamenei, [Jan. 29, 2013]
Source: Khamenei.ir , Shafaqna English