noun
journey of life
A yojijukugo (four-character compound) used in literary or reflective contexts to refer to the course or path of one's life.
人生行路は時に厳しいが、それでも前に進むしかない。
The journey of life is sometimes harsh, but we have no choice but to move forward.
Compound of 人生 (jinsei, 'life') and 行路 (kōro, 'path, route'). The exact historical derivation is uncertain, but the phrase is a conventional yojijukugo.