Is the Hadith, "The people of Paradise will not regret anything except for a moment that passed in which they did not remember Allah," authentic? What is the benefit of good deeds if the people of the lower ranks in Paradise will not feel regret? How can one achieve perfect faith? Is it better to study Sharia or human medicine? Are there accredited Islamic universities in Egypt other than Al-Azhar?

The noble Hadith (definition), "The people of Paradise will not regret anything except for a moment that passed them by in which they did not remember Allah the Exalted," is weak. Even if it were authentic, its intended meaning would refer to believers before entering Paradise, at the stage of accountability, and not the people of Paradise after their entry, as there is no regret or sorrow therein.

A believer strives in worship for several reasons: 1. To draw closer to Allah and worship Him. 2. To thank Allah for His blessings. 3. The desire to attain the highest ranks in Paradise. 4. The aspiration to accompany the Prophet, peace and blessings be upon him, in Paradise.

A servant's faith is perfected by performing the obligatory acts, and by striving in supererogatory acts such as prayer, fasting, Hajj, charity, remembrance (dhikr), recitation (of the Quran), righteousness, maintaining kinship ties, and good deeds, as well as by refraining from forbidden and disliked acts.

As for the preference between studying Sharia (definition) and medicine, it depends on inclinations, aptitude, and level of proficiency, while being careful to avoid mixed-gender study environments.