In 1928, for example, Imam completed a commentary on Sharh Du’a’ al-Sahar, the supplications recited throughout the holy month of Ramadanand narrated by Imam Muhammad al-Baqir (PBUH). This detailed commentary is considered as one of significant work by Imam Khomeini on mysticism
Two years later, Imam Khomeini, the leader of contemporary Muslim world, completed Misbah al-Hidaya ila ‘l-Khilafa wa ‘l-Wilaya, which includes several historic philosophical and mystical discussions.
Another significant important work left by Imam during those years was concentration on gnosis was a series of glosses on Qaysari’s commentary on the Fusus.
In 1930s, Imam Khomeini spent most of his time studying and teaching the works of Mullah Sadra.
The same spirit of comprehensive revolt inspires the first work written by the Imam for publication, Kashf al-Asrar (Tehran, 1324 Sh. /1945). Imam is said to have completed the book in forty-eight days from a sense of urgency.
The principal aim of the book, as reflected in its title, was to refute ‘Ali Akbar Hakamizada’s Asrar-i Hazarsala, a work calling for a “reform” of Shia Islam.
Similar attacks on Shi’i tradition were being made in the same period by Shari’at Sanglaji (d.1944), an admirer of Wahhabism despite that sect’s marked hostility to Shi’ism.
The Imam’s vindication of such aspects of Shia practice as the mourning ceremonies of Muharram, pilgrimage (ziyara) to the tombs of the infallible Imams, and the recitation of the supplicatory prayers composed by the Imams, was therefore a response to the criticisms made by all three.
Imam Khomeini also bitterly criticized the Pahlavi regime for destroying public morality and connected their assaults on tradition with the anti-religious policies of Riza Shah and.
There can be no doubt that the “better system” already envisaged by Imam Khomeini in 1944 was vilayat-i faqih, which became the constitutional cornerstone of the Islamic Republic of Iran established in 1979.
It is worthy to mention that Imam had well command various disciplines of knowledge and left works covering a range of fields including philosophy, mysticism, Quranic and Hadith Science, jurisprudence and poetry and literature.