Does the Hadith: "Undertake such deeds as you are able to, for indeed Allah does not tire until you tire. And the most beloved of deeds to Allah are those that are most continuous, even if they are few," mean that a Muslim should adhere to moderation in all aspects of their life, or does success require hard work and perseverance, which might contradict the concept of moderation?

There is no contradiction between diligence and perseverance in righteous deeds and hastening to good deeds, and moderation and avoiding self-imposed hardship. The texts of the Quran and Sunnah (definition) have indicated both matters. Islam is a religion of ease, with no hardship in it. Allah has commanded hastening to His forgiveness, and the most beloved deeds to Allah are those that are continuous, even if they are few. A person must only burden himself with what he can bear of deeds. Scholars have also indicated that "al-tasdeed" (acting with precision) means to act with intention and moderation in worship, which implies exerting effort to achieve good and persevering in it without exceeding one's capacity or causing harm to one's religion or worldly life. This applies to matters of worship and worldly life alike, for a strong believer is more beloved to Allah than a weak believer.