What are the eight faculties (jawareh) that are commanded to be safeguarded during fasting?

The noble prophetic Hadith, "Be truly shy before Allah," is summarized in guarding the head and what it comprehends (the outward senses), and the belly and what it contains (the heart from polytheism and unlawful things, the stomach from unlawful food, and the private parts). It also reminds us of death and decay, and of forsaking the adornments of this worldly life for whoever desires the Hereafter. Guarding the limbs is not restricted to fasting; rather, it is required at all times and is emphasized during fasting to achieve piety.