All human beings throughout history have felt a spiritual need for this great, amazing phenomenon. This is because history has been mixed with cruelty and evil from the start and up until today and this [will continue] from today until the appearance of that sun that shines its rays on the world. All those who have suffered from oppression – whether those who were wronged and suffered themselves or those who suffered from seeing others being oppressed – experience a feeling of hope in their hearts when they remember the birth of this great savior of humanity in history. We wouldn’t be exaggerating if we were to label Imam Mahdi’s (aj) birthday as “God’s greatest Eid.”
Imam Khamenei
June 4, 2015