The pearls of the Qur'an never truly fails to amaze the believer. Allah subhanahu wa ta'ala (glorified and exalted be He) tells us in the Qur'an, "Indeed in the Qur'an is a reminder for whoever has a heart or who listens while he is present [in mind]." (Surah Qaf; 37) Allah only discusses those things in the Qur'an which we need to know in order for us to traverse through this dunya successfully to Him. Many a time, we find Allah going into detail or mentioning something very clearly, and at other times we find that Allah simply touches upon a topic without elaborating. This is because the Qur'an is applicable to each and every single instance, and hence, had Allah gone into detail regarding specific things, it would have defeated the purpose of the Qur'an; i.e. being a source of guidance for each and every generation.