I’m a psychology expert in Finland, the No. 1 happiest country in the world—here's the real meaning of life in 5 words

As a Finnish philosopher and psychology researcher, people often ask me: "What is the meaning of life?" 

But the bigger question isn't about some cosmic meaning of life. It's about how to find meaning in life. What makes life feel worthy and valuable to you?

For six years in a row, Finland has ranked No. 1 as the happiest country in the world. And having lived here my entire life, I've learned that finding meaning in life boils down to five words: Make yourself meaningful to others. 

You can do this by opening yourself up to deep connections with both your community and your passions. Here's how:

There tends to be less status anxiety in Finland because people aren't so concerned about adhering to a rigid, societal definition of success.

It can be hard to live with purpose if you're going through the motions, burned out, or filled with resentment because you're on a path that someone else picked for you. Even a meaningful job like being a doctor can feel empty if your heart isn't in it.

Before you can give to someone else, you have to understand what makes you happy, and start doing more of it.

One of the best ways to serve others is to find something that meets three requirements:

1. You're good at it.
2. It excites you.
3. It has a positive impact on others.

Once you've found a job or a hobby that makes you feel fulfilled, put all your focus into becoming an expert in it. Then share it with your community.

In my courses on well-being, I encourage students to do three random acts of kindness a day. It can be as simple as offering a glass of water to the mailman, spending an afternoon with a grandparent, or helping a tourist find their way. 

It's incredibly uplifting to hear about the unexpected deep bonds that my students develop with others as a result.

Helping people doesn't just feel good in the moment; it benefits your long-term health, too. Studies show that people who give emotional support to their family, friends and neighbors are more likely to live longer.

Talkoot is an old Finnish word that translates to "working together to do something that one would not be able to do alone."

In agricultural times, when someone had a big project at their farm, such as building a barn roof, they'd hold a talkoot. Neighbors would gather voluntarily and put in a day's work to help, then celebrate with food and drinks.

The tradition carries on to this day. Last summer, my neighborhood spent an afternoon planting trees. That evening, we set up tables and had a jolly evening with snacks and beverages.

This kind of culture extends to why Finnish people often feel positively about civic duties like paying taxes. They see it as essential for the good of the whole.

People don't need to make grand gestures to be an important part of your life. Being together in silence is enough to make us feel connected and loved.

For me, going to the sauna with my father or a friend, then silently sitting outside of it and watching nature — the waves of the sea crashing to the shore, the birds singing, the trees humming in the wind — are moments of deep meaning and connection.

As the Finnish saying goes: "Speech is silver, but silence is gold."

Frank Martela, PhD, is a Finnish philosopher and psychology researcher who studies the fundamentals of happiness. He is a lecturer at Aalto University in Finland and the author of "A Wonderful Life: Insights on Finding a Meaningful Existence." Follow him on @frankmartela.

Don't miss:

• Harvard psychologist: If you use any of these 9 phrases every day, 'you're more emotionally secure than most'
• I'm a nutritionist from Japan, home to the world's longest-living people: 5 American foods I never eat
• An 85-year Harvard study found the No. 1 thing that makes us happy in life: It helps us 'live longer'

Want to be smarter and more successful with your money, work & life? Sign up for our new newsletter here

Get CNBC's free report, 11 Ways to Tell if We're in a Recession, where Kelly Evans reviews the top indicators that a recession is coming or has already begun