ROB JENKINS: The four cornerstones of happy marriage: Compatibility

Most of us are familiar with the old saying, “opposites attract,” as well as its corollary: “But likes stay together.”

Both maxims, it appears to me, contain some truth. People seem driven, perhaps biologically, to find mates with physical and personality traits that they themselves lack. We also naturally look for mates whose strengths and weaknesses offset and compensate for our own.

But in the end, what really draws people together — and keeps them together — is that they have a similar world views and share common values, hopes, and goals.

Perhaps the most important thing a couple can do before they get married is have a frank and wide-ranging conversation about all the issues that will become important down the road: child-rearing, family finances, expectations for the future. Because no matter how “in love” two people might be, they will find it incredibly challenging to build a happy, lasting marriage if they can’t agree on the basics.

Fortunately, more and more couples seem to be having that conversation these days. The problem is that the discussion must be ongoing, extending far beyond courtship. Throughout their marriage, couples need to communicate constantly about those issues and many others.

The fact is, people change. What they want in their mid-20s isn’t necessarily what they want in their late 30s. A wife who, early on, agrees to stay home and raise the children may decide later she wants to go back to work. A husband may discover he’s far more ambitious than he thought, necessitating longer hours at the office than anticipated.

People’s interests change, too. Someone who liked to hike and camp at age 23 might not be so adventurous at 43. Someone who gets tired of being overweight might embark on a strict diet or start training for marathons. In such cases, there’s always the risk of one partner leaving the other behind. I’ve seen it happen many times.

That’s why, as a marriage matures, sacrifice becomes an important and often-overlooked aspect of what we call “compatibility.” Early on, compatibility is a matter of shared interests and perspectives. But at some point along the way, it becomes a conscious choice.

Sometimes, in order to keep the marriage strong, we have to choose not to let other interests or activities — however good they might be — come between us and our partner. We also have to choose, sometimes, to meet that person halfway — to find some way of supporting and taking an interest in the things that interest him or her.

Compatibility is hardly a given, even early in a marriage — and if anything, it tends to get harder as the years go by. But if we constantly talk about the important issues, and if we truly put the other person first, then we should be able to maintain a level of compatibility that enables us to live together in relative peace and harmony.

Rob Jenkins is a local freelance writer and the author of “Family Man: The Art of Surviving Domestic Tranquility,” available at Books for Less and on Amazon. E-mail Rob at rjenkinsgdp@yahoo.com or follow him on Twitter @FamilyManRob.