Literature Reference: 恩深义重，玄妙无穷。—— 《庄子·外物》 Deep gratitude and profound mystery are endless. Source from 'Zhuangzi·Waiwu'.
恩: Gratitude and reciprocation embody the spirit of kindness and the expression of compassion.
玄: Cultivated and erudite.
Meaning: It symbolizes deep gratitude and profound wisdom, representing thankfulness and insightful contemplation.