John Gottman can listen to a couple for 5 minutes and determine, with 91% accuracy, whether they’ll divorce.

He was featured in Malcolm Gladwell’s book Blink.

Gottman’s researched marriage for over 40 years and couples that attend his workshops have half the relapse rate that standard therapy provides.

His book The Seven Principles for Making Marriage Work is excellent and rich with information.

In it he debunks a lot of myths about marriage, explains why marriages go bad and what can be done about it.

The Four Horsemen

How can he tell who will split up? There are a number of indicators but at the core of Gottman’s research are ” The Four Horsemen.” These are the four things that indicate a marriage apocalypse is on its way:

Criticism – Complaints are fine. Criticism is more global — it attacks the person, not their behavior. They didn’t take out the garbage because they forgot, but because they’re a bad person.

– Complaints are fine. Criticism is more global — it attacks the person, not their behavior. They didn’t take out the garbage because they forgot, but because they’re a bad person. Contempt – “…name-calling, eye-rolling, sneering, mockery, and hostile humor. In whatever form, contempt – the worst of the four horsemen – is poisonous to a relationship because it conveys disgust. It’s virtually impossible to resolve a problem when your partner is getting the message that you’re disgusted with him or her.”

– “…name-calling, eye-rolling, sneering, mockery, and hostile humor. In whatever form, contempt – the worst of the four horsemen – is poisonous to a relationship because it conveys disgust. It’s virtually impossible to resolve a problem when your partner is getting the message that you’re disgusted with him or her.” Defensiveness – “…defensiveness is really a way of blaming your partner. You’re saying, in effect, ‘The problem isn’t me, it’s you.’ Defensiveness just escalates the conflict, which is why it’s so deadly.”

– “…defensiveness is really a way of blaming your partner. You’re saying, in effect, ‘The problem isn’t me, it’s you.’ Defensiveness just escalates the conflict, which is why it’s so deadly.” Stonewalling – Tuning out. Disengaging. This doesn’t just remove the person from the conflict, it ends up removing them, emotionally, from the relationship.

What was the biggest insight about marriage?

What surprised me the most? Gottman’s research reveals that major differences of opinion don’t destroy marriages, it’s how a couple deals with them.

69% of a couple’s problems are perpetual. These problems don’t go away yet many couples keep arguing about them year after year:

Most marital arguments cannot be resolved. Couples spend year after year trying to change each other’s mind – but it can’t be done. This is because most of their disagreements are rooted in fundamental differences of lifestyle, personality, or values. By fighting over these differences, all they succeed in doing is wasting their time and harming their marriage.

How do good marriages deal with issues that can’t be resolved? They accept one another as-is:

These couples intuitively understand that problems are inevitably part of a relationship, much the way chronic physical ailments are inevitable as you get older. They are like a trick knee, a bad back, an irritable bowel, or tennis elbow. We may not love these problems, but we are able to cope with them, to avoid situations that worsen them, and to develop strategies and routines that help us deal with them. Psychologist Dan Wile said it best in his bookAfter the Honeymoon: “When choosing a long-term partner… you will inevitably be choosing a particular set of unsolvable problems that you’ll be grappling with for the next ten, twenty or fifty years.

What makes a marriage flourish?

The book is loaded with powerful information, anecdotes and advice. I’ll cover three useful elements here.

1) Really knowing each other is vital:

…emotionally intelligent couples are intimately familiar with each other’s world… these couples have made plenty of cognitive room for their marriage. They remember the major events in each other’s history, and they keep updating their information as the facts and feelings of their spouse’s world change.

2) When fighting, do your best to avoid using the word you and try to use the word I. This makes it much easier to express feelings and much harder to attack the other person.

3) What’s the most powerful little exercise to improve a marriage? “Reunite at the end of the day and talk about how it went.” The goal is to bleed off stress from the day so it can’t negatively affect your relationship.

A few other interesting bits:

“…an unhappy marriage can increase your chances of getting sick by roughly 35% and even shorten your life by an average of four years.”

“96% of the time you can predict the outcome of a conversation based on the first three minutes of the fifteen minute interaction…”

“I’ve found 94 percent of the time that couples who put a positive spin on their marriage’s history are likely to have a happy future as well. When happy memories are distorted, it’s a sign that the marriage needs help.”

There’s too much information in the book for me to really do it justice here.

If the subject is of interest to you, check it out: The Seven Principles for Making Marriage Work.

Join over 161,000 readers. Get a free weekly update via email here.

Related posts:

The Science Of “Happily Ever After”: 3 Things That Keep Love Alive

What are the 5 things that make love last?

What should you look for in a marriage partner?

This piece originally appeared on Barking Up the Wrong Tree.

Read next: 10 Rules to Make Your Relationship Last

Listen to the most important stories of the day.

Contact us at letters@time.com.