Not many people have strong, joyous marriages. Not many couples last. It's incredibly rare--a testament to how broken we all are. How fickle and fleeting and false. Every single one of us.
Protect your marriage, friends. Guard it above all else. Cherish and nurture it. Love your spouses. Forgive them even when it's hard. Forgive them even if you're right. Show them grace every minute. Extend mercy. Be kind. Be gracious. Be uplifting.
And most importantly, when you fail at doing these things (and you will), rest. Rest in Jesus's forgiveness and his never-ending mercies. He is the only hope for our marriages and our ever-wandering souls.