So if he did not ‘sow’ anything in there for his Hereafter, then he has lost it, and [as a result] he has lost his Hereafter.
From the greatest of causes for the uprightness of the heart and its protection [from harm] is the plentiful reading of the qur.aan.
Whoever does not possess a determination for [anything] other than [fulfilling the desires of] his stomach and his private parts, then he is considered from amongst the beasts…
By Allaah, were the hearts sound (pure), they would be saddened at missing out [from goodness to be attained]. How many are the hours which pass by us, and we are prevented from benefitting from them?