The late Imam al-Khumayni in his Sirr al-Salat (the Kernel...
The late Imam al-Khumayni in his Sirr al-Salat (the Kernel of Prayer) enumerates the levels of 'attention to the act of worship' as follows: [^3] • Attention to Worship in General : In this rudimentary level, which is attainable for all (the believers), the worshipper must inculcate in his heart that worship is the act of praising the Creator.
And from the beginning of the act of worship up to its end he should make the heart understand that he is extolling the Creator, even though he does not understand the meaning of what he expresses. • Attention to Worship in Detail: In this level the worshipper's heart is present at every moment of the worship he is engaged in. Besides, he also knows how he praises and whispers to his Lord.
This level itself is subdivided into several different levels depending on the stations of the hearts of the worshippers and their gnosis. Levels of Detailed Attention • Level 1 : A group of people do not comprehend save the outer and overt facet of prayer. However, they do understand the general import of the recitations, laudations, and invocations they pronounce in prayer. The presence of their heart, however, is limited to inculcating the meaning of whatever they recite in prayer.
It is highly important for this group not to limit the meaning of what they recite in what they understand there-from; (in other words,) they should not think that there isn't any (other) meaning of what they recite save that which they apparently comprehend.
"For," says Imam al-Khumayni, "this belief besides being contrary to the intellect and tradition, is very detrimental to the human being too." And one of the great masterpiece ruses of Satan is to occupy and please man with what he (already) possesses, and make him cynical towards the rest of the unknown realities and sciences, thereby deriving astonishing results. • Level 2: Another group consists of those who intellectually understand the realities of the acts of prayer.
For example they understand by intellectual proof how all praises (solely) return to God; or they know the reality of Sirat al Mustaqim and the meaning of Surat al-Tawhid that represents the fundamental facets of the ideological realities. All this is known, however, through rational proofs and the intellect.
The huduru 'l qalb of this group in prayer is such that their hearts are attentive and comprehend in detail the realities and the laudations they recite, and understand what they express and how they praise their Lord.