first things first: I'm
down 1.4 this week.
I knew others would step up and tell you that it is probably muscle and fluid retention from strength training, so I don't need to tell you this. But I did have to comment on what I quoted. I think you have succinctly stated what is true for everyone on this thread.
As someone who lost the bulk of my weight 18 years ago, I tell you that it is a constant battle. We can never expect to be "there" and able to give up the attention to diet and exercise. That's just part of who we are. Some people can eat a tremendous amount and not gain weight. Some are happy with themselves no matter what their weight. There have been times when I've thrown in the towel, but then the weight crept back and made me miserable again. Sometimes I think, "Why bother?" because I'm never going to be a swimsuit model, or a size 2.
There was a defining moment, though, when I decided I would never just give up. A few years ago, I saw a woman on some show, (I think it was Oprah), and this woman weighed about 400 lbs. She said that she had dieted down to 200, but couldn't get below that, so figured dieting wasn't worth it. I thought to myself, "That's what is out there if I just give up." Better to struggle and have a BMI of 25 or 30, than give up and have one of 60 or 65.

to all the peeps who lost, gained, or stayed the same this week. Never give up. It IS worth it.