I think the same happens after a busy day at work, when I'm so exhausted all I want to do is go to bed. Then I open the door to my house and all of my kids are standing by the door, grinning cheek to cheek, yelling, "DAADDDYYY'S HOME!!!"
Then my two little ones each want me to pick him or her up. It's moments like these that cheer a person up. It's moments like these you're going to remember when you're standing close to the pearly gates of Heaven looking back on your life.