"It is essential for Basijis to refrain from extremism in practice, because extremist action is as harmful as inaction," the Leader said in an address to a gathering of Basij members in Qom on Sunday.
"The revolutionary zeal of the Basiji youth should grow every day, but they should be careful to use it appropriately," he stated.
Ayatollah Khamenei advised the Basij forces to be vigilant in the face of the enemies' plots to distort the truth about Iran's progress.
"Today, one of the main objectives of the enemies, in line with their soft war, is distorting the truth about the country," he said.
However, the enemies' approach shows their weakness in the face of the rapid and great progress of the Iranian nation in the right direction, he noted.
The Leader pointed to the massive propaganda campaign launched against Iran and said the enemy is trying to present a false and discouraging image of Iran's economic situation and claiming Iran's economy is in crisis.
Attempting to distort the truth about Iran is not a new approach and the enemies have followed this policy for the past 30 years, but they have stepped up their propaganda campaign because the current Iranian government officials are acting on revolutionary principles more diligently and seriously than ever, he stated.
He went on to say that some seditionists claim that the Islamic system has lost face in the world, but today the nations of the world have a high opinion of the Islamic Republic of Iran.
Commenting on the rapturous welcome that the Lebanese nation gave President Mahmoud Ahmadinejad during his recent visit, Ayatollah Khamenei said no other country's president would be received in such a manner.
He also highlighted the importance of the president's trip to Lebanon and said this success should not be downplayed.
Elsewhere in his remarks, the Leader spoke about the political unrest that followed the June 2009 presidential election, saying that after the election, many people and figures made mistakes, but the Basij never failed and stayed on the right path.
Ayatollah Khamenei said even distinguished and reliable figures can make mistakes, so figures' remarks should not be taken as criteria for discovering the truth.
"The criterion for discovering the truth is Islam," he added.
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