Why did Imam Khomeini put emphasis on spiritual construction of nation?

Why international Quds Day is considered as Imam Khomeini’s legacy?

Imam Khomeini stresses self-conditioning, guarding against evil

Imam Khomeini has stressed through his theological works that it is essential that throughout the period of stipulation the mujahid struggling against his own self should constantly concentrate upon his actions.

Imam Khomeini has had no fear of any super power.

Pakistan Times

One of the moral maladies is maltreatment of other people, Imam Khomeini explained

Imam Khomeini through his theological works explained that one of the moral maladies is the maltreatment of the people of his household, his neighbors, his colleagues and others around him.

Obedience to God gives ample pleasure, Imam explains

Imam Khomeini explains that faithful people will also notice that obedience to God gives ample pleasure.

Beware of the aftermath of your deeds, Imam Khomeini advised

Imam Khomeini advised through his theological works advised believers fear God! Beware of the aftermath of your deeds! Wake up from the sleep of negligence!

Imam Khomeini warned against disregarding divine signs

Imam Khomeini through his theological works warned the humanity against disregarding clear divine signs in the world and asked the faithful people to engage in self purification in order to get ready for the Barzakh (an interval of time between the death of man and his resurrection).