Imam Khomeini was entrusted with almost total authority of the country's affairs but he opted for and established the republican system of government based on Islamic teachings by the will of the people. Although Imam Khomeini was the Supreme Leader, he never interfered in the administration of government, except giving guidance when required. He allowed the elected representatives of the people to run the system. The personal life and conduct of this powerful ruler of a vast and affluent country was like that of a poor man. He ate only the food of the common man and his costume selection was minimal. His social conduct, administration of justice and liking and hatred were all seeking divine satisfaction. It is clear from all events that he has always been committed to upholding justice, and in the face of the difficult trials of his life the imposed war and economic sanction on the nation he faced all these with patience and courage. The present period is full of lessons for Islamic nations around the world. If the leaders of the Islamic world follow these lessons of the Imam, they will certainly move towards the path of prosperity, self-respect, and security.