philosophy of life; guiding principle in life
Refers to a personal creed or set of principles that guide one's daily conduct and decisions.
His philosophy of life is 'one good deed a day.'
Health first is my guiding principle in life.
人生観 is a broader view of life or outlook on life, while 生活信条 is more about specific principles or rules one lives by.
信条 is a general creed or belief, not necessarily tied to daily living; 生活信条 specifically applies to one's lifestyle.
Compound of 生活 (life, living) and 信条 (creed, principle). The exact historical derivation is uncertain, but the word is a straightforward Sino-Japanese compound.