precepts for living; maxims for life
Refers to teachings, sayings, or principles that guide one's conduct in society. Often used in the context of moral or practical advice for daily life.
My grandfather often recited old precepts for living.
This book contains many useful maxims for life.
格言 is a proverb or maxim in general, whereas 処世訓 emphasizes guidance for personal conduct in society.
Compound of 処世 (しょせい, 'conduct in life') and 訓 (くん, 'teaching, precept'). The exact historical derivation is uncertain, but the term is conventionally associated with practical life guidance.