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Peechaya Burroughs for TIME
Barker is the author of Barking Up The Wrong Tree

People have enormous respect for ancient wisdom. They just don’t read it. Funny thing is, we’re more likely to live happier lives when we visit the classics section than the self-help aisle.

So how do we get the skinny on what one group of brilliant dead guys — The Stoics — had to say? Well, for that, I called my friend Ryan.

Ryan Holiday is the bestselling author of The Obstacle is the Way and Ego is the Enemy. His new book is The Daily Stoic: 366 Meditations on Wisdom, Perseverance, and the Art of Living.

So what can the guys who invented the toga party teach us about living well? Let’s get to it…

Events Don’t Upset You. Beliefs Do.

You get dumped by someone you’re totally in love with. Feel sad? God, yes. The world is going to end.

Okay, same scenario, but afterwards you find out that person was actually a psychopath who killed their last three partners. Feel sad you got dumped? No, you’re thrilled.

So clearly “getting dumped” isn’t the important factor here. What changed? Nothing but your beliefs.

If you lose your job and believe it was a lousy position and believe it won’t be hard for you to get a better job, you’re unfazed.

If you believe it was the greatest job ever and believe you’ll never get another one that good — you’re devastated. Emotions aren’t random. They follow from beliefs. Here’s Ryan:

Skeptical? Sound too simple? Guess what? You couldn’t be more wrong…

This part of Stoic philosophy was adapted by famed psychologist Albert Ellis to form Cognitive Behavioral Therapy — which is now the dominant method for helping people overcome problems ranging from depression to anxiety to anger.

Most of the bad feelings you have are caused by irrational beliefs.

Next time you’re feeling negative emotions, don’t focus on the event that you think “caused” them. Ask yourself what belief you hold about that event. And then ask yourself if it’s rational:

  • “If my partner dumps me, I’ll never get over it.”
  • “If I lose my job, my life is over.”
  • “If I don’t finish reading this post, the writer will hate me forever.”

Only the third one is true. The other two are irrational. And that’s why you get anxious, angry or depressed.

Revise your beliefs and you can change your feelings: “Even if they dump me, I can meet someone else. It’s happened before and I got over it.”

(To learn more from Albert Ellis about how to never be frustrated again, click here.)

So you’re revising your beliefs to overcome sadness and anger. Awesome. But what about when you’re unhappy because you’re worried about the future?

Read more: How To Get People To Like You: 7 Ways From An FBI Behavior Expert

Control What You Can. Ignore The Rest.

You know the Serenity Prayer?

Reinhold Nieburh came up with it around 1934. The Stoics were preaching that basic idea, oh, about 2000 years earlier.

The Stoics were really big on control. But they were not control freaks at all. A key part of Stoicism is just asking yourself, “Can I do anything about this?”

If you can, do it. If you can’t… then you can’t. But worrying achieves nothing but stress. Here’s Ryan:

Here’s a quick visual to help get the point across:

Next time you’re worrying, pause and ask yourself, “Do I have control over this?” If you do, stop worrying and get to work.

If you don’t have control, worrying won’t make it better. And going back to the first point, it might be a good idea to ask yourself what your belief is that’s causing all this worry… Yeah, it’s probably irrational.

(To learn more lifehacks from a variety of ancient thinkers, click here.)

So sadness, anger and worrying are irrational responses and they’re not the right way to react when things happen. So what is the right way to react to stuff that doesn’t meet your expectations?

Read more: New Neuroscience Reveals 4 Rituals That Will Make You Happy

Accept Everything. But Don’t Be Passive.

This is the one everybody has trouble with. Nobody likes the word “accept.” We think it means “give up.” It doesn’t.

Let’s look at it this way: what’s the opposite of accept? Deny. As in “denial.” And nobody ever recommends denial.

Albert Ellis told people they’d be much happier if they removed the word “should” from their vocabulary. “Should” is denial. You’re saying your expectations deserve to override reality:

  • “My kids shouldn’t be misbehaving!” (News flash: they are.)
  • “Traffic shouldn’t be this bad!” (Um, but it is.)
  • “It shouldn’t be raining!” (Say it louder. Complaining might work this time.)

Denial is irrational, and as we just learned, irrational beliefs are where negative emotions come from. So the first step is to accept reality. But that doesn’t mean you have to be passive.

You accept the rain. It’s here. Denial and shoulds won’t change anything… but that doesn’t mean you can’t grab an umbrella. Here’s Ryan:

Next time things don’t go your way, don’t deny reality. Accept it. It’s here. Then ask if you have control over it. If you do, do something. If you don’t, ask if your beliefs are rational.

That’s how you go from: “It shouldn’t be raining! We can’t go to the park! The day is ruined!” to “Yeah, it’s raining. No park today. Let’s see an awesome movie.”

(To learn the neuroscience behind mindfulness, another ancient happiness technique, click here.)

Alright, we’ve covered a lot of Stoic methods for beating bad feelings. That covers defense. Let’s talk offense. How do you improve your life?

Read more: New Harvard Research Reveals A Fun Way To Be More Successful

Choose Whose Child You Will Be

I know, I know — that doesn’t make any sense at all. Hold your horses, I’ll explain…

Everything we’ve talked about so far happens in your head. And, as we learned, that’s where the problems usually start. But if life’s gonna get better we need to learn from other people.

You’re not alone in this world. You have so much to learn from others. Role models. Mentors. And Seneca, one of the big cheeses of Stoicism, got the point across with this beautiful quote that I love:

When I spoke to Anders Ericsson, the professor who came up with the “10,000 hours” theory of expertise, he said the first step in being better at anything (and that includes life) is to find a mentor. Here’s Anders:

Next time you face a challenge, think of someone you admire. Research shows asking yourself “What would _____ do?” can have powerful positive effects on your behavior.

(To learn how to find the best mentor for you, click here.)

Role models and mentors are great for helping you be your best. But how do you make sure you’re actuallyimproving? How do you know you’re making progress toward being the best you?

Morning And Evening Rituals Are Essential

Plenty of research shows that rituals can really improve your life. What type did the Stoics recommend?

Morning rituals and evening rituals. One to get you ready for the day, the other to reflect on how things went and figure out what to improve. Here’s Ryan:

The Stoics didn’t believe in perfection. They felt we were all a work-in-progress. You can always be getting better. As Seneca said:

(To learn the morning ritual that will keep you happy all day, click here.)

Okay, we’ve learned a lot of ancient wisdom. Let’s round it up and get the final tip that science agrees is one of the most powerful happiness boosters…

Sum Up

Here’s how ancient wisdom from the Stoics can help you be happier:

  • Events Don’t Upset You. Beliefs Do: Only the end of the world is the end of the world.
  • Control What You Can. Ignore The Rest: Worrying never fixed anything.
  • Accept Everything. But Don’t Be Passive: Nobody recommends denial. Accept. And then do something.
  • Choose Whose Child You Will Be: “What would Batman do in this situation?”
  • Morning And Evening Rituals Are Essential: Plan for the day, then reflect on the day.

Marcus Aurelius’ classic book “Meditations” starts out kinda weird. He mentions all the people who he feels indebted to for having helped him. It’s basically a gratitude list.

The Stoics were big on gratitude. In fact, in Meditations he wrote:

A few thousand years later research would catch up with him on that one. Studies show mentally subtracting cherished moments from your life makes you appreciate them more, makes you grateful and makes you happier.

“What if I never met my partner? What if my child was never born? Wow, I am so lucky to have them in my life.”

You don’t need that shiny new thing in order to smile. Take a second to appreciate all the shiny things you already have that aren’t so new.

New is overrated. Sometimes ideas from thousands of years ago are all we need to be happy.

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This article originally appeared on Barking Up The Wrong Tree.

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