How was Imam Khomeini different from other revolutionaries?

Even in the last few days of his life, nobody noticed any signs of despair, doubt, exhaustion, weakness or submission in the words and actions of our magnanimous Imam (r.a.). Many revolutionaries throughout the world start to have doubts and become conservative as they grow older. Sometimes they even take back their main statements. The statements that were issued by Imam (r.a.) during the last few years of his life were sometimes even more strongly worded and revolutionary than his statements in the year 1342. He was growing old, but he was young at heart and his soul was vibrant. This is the same steadfastness that has been described in the Holy Quran: "And that if they should keep to the (right) way, We would certainly give them to drink of abundant water." [The Holy Quran, 72: 16] In another ayah, Allah the Exalted says: "(As for) those who say: Our Lord is Allah, then continue in the right way, the angels descend upon them, saying: Fear not, nor be grieved, and receive good news of the garden which you were promised." [The Holy Quran, 41: 30] These three beliefs kept Imam (r.a.) young and vibrant. They consolidated Imam's thought and path for our nation and then these three beliefs gradually spread among our people, our youth and individuals from different social backgrounds. These three beliefs created hope. They created self-confidence. They resulted in reliance on God. These things replaced despair and pessimism. The people of Iran changed their characteristics and Allah the Exalted changed their conditions. "Surely Allah does not change the condition of a people until they change their own condition." [The Holy Quran, 13: 11] The people of Iran reformed their path, their movement and their motives and Allah the Exalted helped and supported them. What was the result? The result was that Iran became an independent country.