The phrase "eternal truth" refers to a truth or fact that is believed to be valid and unchanging throughout time. It suggests that it is a timeless and enduring reality that holds its value and relevance indefinitely. Full definition
It embodies an ancient philosophy based on a deep understanding of eternal truths about the human body, the mind and the spirit. (learnlivingayurveda.com)
Your issues are with time - anchored situations, not with eternal truth. (nakedpastor.com)
They too are interventions to be understood indexically and historically, not as though they encapsulated eternal truths about the way things must necessarily be. (firstthings.com)