Literature Reference: 曾是平生游，无因理归乘。—— 《和州送钱侍御自宣州幕拜官便于华州觐省》 Once a wanderer in life, now without reason to return. Source from 'Hezhou Song Qian Shiyu'.
无: No, it's clean, won't happen.
因: The cause, the reason, the pre-existing conditions that lead to the occurrence of an event.
Meaning: Without reason, it expresses a detached and free-spirited attitude towards life.