As-Salaam alaikum,
Have you ever considered the acquisition of the sweetness of faith (Imaan) and that immense enjoyment in the worship (Ibaadah) we do? The pleasure a person finds in his Sallaah impels him to delay his Sajdas. His Zikr of Allah Ta'ala emanates from the deep recesses of his heart... intoxicating him. The requirement for this intoxication and ecstasy is not wine or worldly love; the requirement for this 'high' is neither heroine nor cocaine, it is the Remembrance of his Beloved Lord (Allahu).
When he recites the Holy Qur'an, it is as if he is conversing with his Rabb. The Speech of Allah Ta'ala, which he recites, deeply impresses upon his heart and establishes a profound and strong Imaan within him. With a deep hearted enjoyment, he believes that his Lord, Allah, is listening to His Own Kalaam (Speech) from the tongue of His sinful servant.
Allahu Akbar! Wa Lillahil-Hamd!!