What is the ruling on worship with the intention of obtaining its fruits or psychological comfort, and is this intention valid?

Reciting the Qur’an is a great act of worship that brings tranquility and peace to the heart, for it is one of the best forms of remembrance. There is no harm in you reciting it to achieve peace of mind and alleviate self-reproach, provided you believe that recitation is a means of drawing closer to Allah’s mercy and grace. It is important to be aware of the danger of abandoning the Qur’an and neglecting its recitation. As for the reproaching soul (al-nafs al-lawwamah) that blames its owner for neglecting good or committing evil, it is inferior to the tranquil soul (al-nafs al-mutma’innah) which one should strive to attain.