We’ve been married since 1975. We’ve had many, many more happy days than sad or angry ones. I know some people wonder why we’re still together. I heard it again in the 2016 campaign: that “we must have an arrangement” (we do; it’s called a marriage); that I helped him become president and then stayed so he could help me become president (no); that we lead completely separate lives, and it’s just a marriage on paper now (he is reading this over my shoulder in our kitchen with our dogs underfoot, and in a minute he will reorganize our bookshelves for the millionth time, which means I will not be able to find any of my books, and once I learn the new system, he’ll just redo it again, but I don’t mind because he really loves to organize those bookshelves).

I don’t believe our marriage is anyone’s business. Public people should be allowed to have private lives, too. But I know that a lot of people are genuinely interested. Maybe you’re flat-out perplexed. Maybe you want to know how this works because you are married and would like it to last 40 years or longer, and you’re looking for perspective. I certainly can’t fault you on that.

I don’t want to delve into all the details, because I really do want to hold on to what’s left of my privacy as much as I can. But I will say this: Bill has been an extraordinary father to our beloved daughter and an exuberant, hands-on grandfather to our two grandchildren. I look at Chelsea and Charlotte and Aidan and I think, We did this. That’s a big deal.

He has been my partner in life and my greatest champion. He never once asked me to put my career on hold for his. He never once suggested that maybe I shouldn’t compete for anything—in work or politics—because it would interfere with his life or ambitions. There were stretches of time in which my husband’s job was unquestionably more important than mine, and he still didn’t play that card. I have never felt like anything but an equal. Bill is completely unbothered by having an ambitious, opinionated, occasionally pushy wife. In fact, he loves me for it.

Long before I thought of running for public office, he was saying, “You should do it. You’d be great at it. I’d love to vote for you.” He helped me believe in this bigger version of myself. Bill was a devoted son-in-law and always made my parents feel welcome in our home. Toward the end of my mother’s life, when I wanted her to move into our house in Washington, he said yes without hesitation. Though I expected nothing less, this meant the world to me. I know so many women who are married to men who—though they have their good qualities—can be sullen, moody, irritated at small requests, and generally disappointed with everyone and everything. Bill Clinton is the opposite. He has a temper, but he’s never mean. And he’s funny, friendly, unflappable in the face of mishaps and inconveniences, and easily delighted by the world—remember those balloons at the convention? He is fabulous company.

We’ve certainly had dark days in our marriage. You know all about them—and please consider for a moment what it would be like for the whole world to know about the worst moments in your relationship. There were times that I was deeply unsure about whether our marriage could or should survive. But on those days, I asked myself the questions that mattered most to me: Do I still love him? And can I still be in this marriage without becoming unrecognizable to myself— twisted by anger, resentment, or remoteness? The answers were always yes. So I kept going.

On our first date, we went to the Yale University Art Gallery to see a Mark Rothko exhibit. The building was closed, but Bill talked our way in. When I think about that afternoon—seeing the art, hearing the stillness all around us, giddy about this person whom I had just met but somehow knew would change my life—it still feels magical, and I feel happy and lucky all over again.

I still think he’s one of the most handsome men I’ve ever known. I’m proud of him: proud of his vast intellect, his big heart, the contributions he has made to the world. I love him with my whole heart. That’s more than enough to build a life on.