noun
inner life; internal life
Refers to a person's mental, emotional, or spiritual existence, as opposed to outward actions or material circumstances. Often used in philosophical, psychological, or literary contexts.
彼は外的な成功よりも内的生活の充実を大切にしている。
He values the richness of his inner life more than external success.
精神生活 also means 'spiritual life' or 'mental life', but it often emphasizes the mind or spirit in a more abstract sense, while 内的生活 focuses on the personal, internal experience.
内面 means 'inner self' or 'inner side' and is a more general term for one's internal state, whereas 内的生活 specifically refers to the ongoing inner life or experience.
Compound of 内的 (ないてき, 'internal, inner') and 生活 (せいかつ, 'life, living'). The exact historical derivation is uncertain, but the word follows a standard Sino-Japanese pattern for abstract concepts.