The late founder of the Islamic Republic on various occasions in this regard said as following:
The rebel and unleashing of the 'self' annihilates one. Any step taken for education and learning should be accompanied with measures to leash and control you 'self'! Control your 'self' which seeks to have no limits. (July 8, 1979)
There are two sides and dimensions to mankind. The spiritual side and the material side. The material aspect is what we observe, that which exists in this world. They are these materials that we witness. The spiritual side is another aspect beyond this world. (June 24, 1979)
All monotheistic schools of thought, in action with Islam, as the superior one, are seeking to train people in such a way that material gains do not act as obstacles for spirituality, although they (the divine religions) are involved with materiality as well.
They seek to bring material gains under the service of spirituality.
While the religions pay heed to the material and the world, they attract people towards spirituality and liberate them from the darkness of the material at the same time. (July 27, 1979)