Imam Khomeini's advice to believers for spiritual transformation on the night of Qadr.

Muslims hold night-long vigils on Qadr Nights until dawn.

The night preceding Imam Ali’s martyrdom is considered to be one of the threefold Qadr (Destiny) Nights, when the Holy Qur’an was revealed to Prophet Muhammad more than 14 centuries ago. Muslims hold night-long vigils on Qadr Nights, reciting the holy Qu’ran and praying until dawn.

Advises and Recommendations of Imam Khomeini about the Holy Month of Ramadan

The blessed month of Ramadan, you should reflect, reform yourselves, and pay attention to God Almighty, seek forgiveness for your unbecoming behavior and deeds, and if, God forbid, you have committed a sin, repent for it prior to entering the blessed month of Ramadan. Habituate your tongue to intimate devotions to God the Almighty

Self purification in the month of Ramadan.

Strive to purify the self in holy month of Ramadan

Imam cancelled meetings during blessed month of Ramadan

A memoirs by Ayatollah Tawasuli, extracted from Howzah magazine- no. 45, page 59

How did Imam Khomeini see connection between Quran and holy month of Ramadan?

Imam Khomeini and the Month of Ramadan