Literature Reference: 出家侍母前，至孝自通禅。—— 《送僧默然》 Serving mother before becoming a monk, filial piety naturally leads to Zen enlightenment. Source from 'Song Seng Moran'.
自: Nature; the true self.
通: Connection and fluency. It fundamentally conveys the idea of being unobstructed and smooth, and also carries the meaning of achieving a prominent or distinguished status.
Meaning: Self-enlightenment implies natural understanding and high wisdom, capable of comprehending truths on one's own.