10/17/2026
This is my 5th piece in the series about what I have learned from The Wisest One in the Room: How You Can Benefit from Social Psychology’s Most Powerful Insights (2015), by Thomas Gilovich and Lee Ross.
For me, one final important insight is this: we do not always act because we believe; sometimes, we come to believe because we act.
We normally assume that people act only after thinking things through and forming an intention. In other words, ideas come before actions. But the authors point to the other side of the relationship: our actions can also shape our thoughts, feelings, and beliefs.
I was skeptical of this idea at first. But consider how taking a brisk walk can sometimes lift your mood. Or think of the familiar saying, “Fake it till you make it.” When you practice acting confidently and taking responsibility, you may gradually begin to see yourself as a more capable person. Repeated actions can change not only what you do but also how you see yourself.
The same principle may help explain why the more effort we invest in a task, the more important it can become to us, or why investing time and energy in a relationship can deepen our attachment to another person. Our actions can influence the meaning we give to our experiences.
Why Does This Matter?
First, it gives us a practical way to change our mood and mindset.
If we want to feel better, we do not always have to wait for our mood to improve before doing something. We can start by changing our behavior. If we want to feel more cheerful, try smiling or taking a quick walk. These actions will not solve every problem, but they may help shift how we feel.
Likewise, if we want to develop an interest in something, we can try doing it before deciding whether we like it. If we want to become more confident, we can practice taking small steps outside our comfort zone. Rather than letting hesitation stop us, we can begin with a manageable action and let experience shape our attitude.
Sometimes, the way forward is not to think our way into action but to act our way toward a new way of thinking.
Second, this insight offers another way to understand ourselves and others.
When we are puzzled by our own feelings or someone else's behavior, we often spend a great deal of time trying to figure out what is going on inside our minds. Yet our actions can provide useful clues. What we repeatedly choose to do, what we devote our time to, and how we treat others may reveal something about our priorities, attachments, and values that we have not fully recognized.
Of course, behavior does not tell the whole story. People sometimes act against their beliefs or values, and the same action can have different motivations. Still, paying attention to what people actually do, alongside what they say, can give us a more grounded understanding of them.
A Final Thought
This book has reminded me that becoming wiser involves more than acquiring knowledge. It also requires examining how we think, how we interpret others, and how our surroundings influence us. For me, one of its most practical lessons is that we do not always need to wait for our thoughts and feelings to change before taking action. Sometimes, a small action is the first step toward a meaningful change in how we think, feel, and live.