“Chīzhāi” is a direct reflection of Buddhism's influence on Chinese culture. The core Buddhist principle of non-violence and compassion for all living things (不杀生, bù shāshēng) is the foundation of this practice. Devout Buddhists may 吃斋 for their entire lives, while many lay practitioners observe it on specific days, most commonly the first and fifteenth day of each lunar month (初一、十五). It is also common to 吃斋 for a period to fulfill a vow, pray for a sick family member, or accumulate spiritual merit. A crucial point of comparison is with Western “vegetarianism” or “veganism.” While both involve abstaining from meat, the primary motivation is different. A person in the West might become a vegetarian for health reasons, environmental concerns, or animal rights activism. These are largely secular, ethical, or personal health choices. In contrast, 吃斋 is fundamentally a religious practice. The focus is on purifying the mind and body, showing reverence, and avoiding the karmic debt of taking a life. This is why a traditional 斋 diet often goes further than standard vegetarianism, also excluding the “five pungent spices” (五辛, wǔxīn) — garlic, onions, scallions, chives, and leeks — which are believed to inflame the passions and distract from a calm, meditative state.
While its roots are ancient, 吃斋 is still a living practice.
This is the most common point of confusion for learners.