In truth, opinion may be taken for understanding; understanding cannot be taken for opinion. How so? Surely because opinion may be deceived; understanding cannot be. If it could, it would not be understanding but opinion. For true understanding has not only certain truth, but the knowledge of truth.

The quote by Saint Bernard explores the distinction between opinion and understanding. Bernard argues that while opinion can be mistaken or deceived, understanding is grounded in certainty and knowledge. Opinion is often based on perception, conjecture, or incomplete information, whereas true understanding involves grasping the reality and essence of a matter.

Bernard emphasizes that understanding cannot be taken for opinion because it embodies both the truth and the knowledge of truth. This means that understanding is not merely a personal perspective but a reasoned, verified comprehension of reality. It is reliable and stable, unlike opinion, which can fluctuate or be misled by appearances.

The quote also highlights the philosophical principle that genuine knowledge involves discernment and insight. To truly understand something is to have penetrated beyond superficial appearances and to perceive the truth as it really is. Bernard suggests that only through rigorous inquiry and reflection can one achieve this level of comprehension.

Originating from Saint Bernard of Clairvaux, a 12th-century theologian and philosopher, the quote reflects his deep engagement with the nature of knowledge and truth. Bernard’s work often explored the interplay between faith, reason, and understanding, emphasizing that authentic understanding is both certain and morally and intellectually transformative.