sense of mission; sense of duty; vocation
A strong inner feeling that one has a duty or calling to do something, often used in professional, social, or personal contexts.
He approaches his work with a strong sense of mission.
Out of a sense of duty as a doctor, she headed to the disaster area.
Compound of 使命 (mission, duty) and 感 (feeling, sense). The exact historical derivation is straightforward; the word is a modern Sino-Japanese compound.