This was his most famous and influential work and laid out his ideas on governance (at that time):
- That the laws of society should be made up only of the laws of God (Sharia), which cover "all human affairs" and "provide instruction and establish norms" for every "topic" in "human life."
- Since Sharia, or Islamic law, is the proper law, those holding government posts should have knowledge of Sharia (Islamic jurists are such people), and that the country's ruler should be a faqih who "surpasses all others in knowledge" of Islamic law and justice, as well as having intelligence and administrative ability. Rule by monarchs and/or assemblies of "those claiming to be representatives of the majority of the people" (i.e. elected parliaments and legislatures) have been proclaimed "wrong" by Islam unless approved by the faqih.
- This system of clerical rule is necessary to prevent injustice: corruption, oppression by the powerful over the poor and weak, innovation and deviation of Islam and Sharia law; and also to destroy anti-Islamic influence and conspiracies by non-Muslim foreign powers.
A modified form of this Velayat-e Faqih system was adopted after Imam Khomeini and his followers took power, and he became the Islamic Republic's first "Guardian" or Grand Leader.
In the meantime, however, Imam Khomeini was careful not to publicize his ideas for clerical rule outside of his Islamic network of opposition to the Shah which he worked to build and strengthen over the next decade. Cassette copies of his lectures fiercely denouncing the Shah as, for example, "the Jewish agent, the American snake whose head must be smashed with a stone," became common items on the markets of Iran, helped to demythologize the power and dignity of the Shah and his reign.
As protest grew, so did Imam Khomeini’s profile and importance. During the last few months of his exile, Imam Khomeini received a constant stream of reporters, supporters, and notables, eager to hear the spiritual leader of the revolution.