What are the indicators of piety? And how can we guarantee that we are heading in the right direction in our spiritual journey? This series elucidates the merits and consequences of piety as seen in the Qur’an, hadith, and the lives of the Ahlul Bayt, and introduces indicators by which one can examine one’s own piety or, if needed, others’ piety. Indeed, piety is one of the most important concepts in the Qur’an by which people are ranked before God as it goes beyond the actions of the body, and is related to the intention behind all actions. In the previous part, the merits of piety (taqwa) according to the Qur’an were studied. In this part, the definition of piety will be explored along with the factors that contribute to its formation.