By  Ming Yan, Editor

A reflection for a new season of learning

How much of what we know today will still be considered true a hundred years from now?

When something contradicts what we have learned, do we become curious—or do we dismiss it because it doesn't fit what we already know?

And perhaps an even more interesting question: How do we know what we don't know?

As September brings students back to classrooms and many of us back to routines of work and study, it is a fitting time to reflect not only on what we learn, but on how we approach knowledge itself.

Knowledge is enormously valuable. It represents what generations of human beings have observed, studied, tested, and passed on.

But knowledge describes our current understanding of reality. It should not be mistaken for the limits of reality itself.

What We “Know” Keeps Changing

History gives us plenty of reason for humility.

For centuries, educated people believed that the heavens revolved around the Earth. Before microorganisms could be observed, physicians had no understanding of germs as a cause of disease. 

Things that are elementary knowledge to a schoolchild today were once unknown even to the greatest minds of their time. The reality was already there. Our ability to perceive and understand it was limited. 

And the process continues.

New instruments allow us to observe what was previously invisible. New discoveries challenge established theories. Better evidence refines—or sometimes overturns—what we thought we understood.

Perhaps that is why Isaac Newton, whose discoveries transformed mathematics and physics, reportedly reflected late in life that he felt like a child playing on the seashore while “the great ocean of truth lay all undiscovered before me.”

Coming from one of history's greatest scientific minds, the image is striking.

The more we discover, the more we may become aware of how much remains beyond our understanding.

When Knowledge Becomes a Boundary

There is a curious paradox in learning. Knowledge opens our minds to things we could not see before. But if we become too certain of it, knowledge can also become a boundary.

We may encounter an unfamiliar idea and think:

That cannot be true. It contradicts what I know.

But there is a meaningful difference between saying “That cannot be true” and “I don't yet understand how that could be true.” The second leaves a door open.

This doesn't mean accepting every unusual claim. Open-mindedness is not the absence of judgment. We should still ask questions, examine evidence, and think critically.

But critical thinking should work in both directions. We can question a new idea while also being willing to question the assumptions we bring to it.

Leaving Room for What We Don't Know

This matters well beyond the classroom. In research, it can mean allowing unexpected evidence to challenge a hypothesis. At work, it can mean listening seriously to an approach that contradicts the way things have always been done.

And in our understanding of life and the world around us, it can mean resisting the temptation to equate “I cannot explain this” with “This cannot exist.”

Perhaps real learning requires both confidence and humility: confidence to use what we know, and humility to recognize where our knowledge ends.

So as a new season of learning begins, perhaps there is one question worth carrying with us: Am I seeing the limits of reality—or simply the limits of what I currently know?

Knowledge gives us somewhere to stand. Wisdom reminds us that there may still be an ocean beyond the shore.