Literature Reference: 君子之道，或出或处，或默或语，或谨或谦。—— 《论语》 The way of a gentleman may be manifested in going forth or staying at home, in silence or speech, in caution or humility. Source from 'The Analects'.
谨: Prudence, meticulousness. Caution, carefulness.
谦: Humble, modest, and gracious. Polite, with a deep understanding of etiquette.
Meaning: Caution and humility embody the virtues of a gentleman cultivating his character.