Comfortable in my own skin

I came across this on Pinterest the other day and it's been stuck in my head. Most of my adult life I was pretty comfortable in my skin. Yeah, I had my little gripes about my body, but nothing I dwelt on. Until a few years ago when I started gaining weight, beyond the baby weight I still carried. When I started my fitness/weight loss journey 9 months ago I just wanted to get back to the post baby size that I had spent 20 years at. Then I got there and was able to go beyond that. I'm actually down to the size I was when I got married, almost 25 years ago now. But I look at my body and still see problems, some the same and some new. I have made this incredible change to my lifestyle and health and I still see things to be unhappy with....and that bothers me. Not because those "imperfections" exist, but because I find myself more focused on them than I like, or than I was before. I feel ungrateful. The Lord has helped me to lose 40 pounds and to get healthier and more fit than I have been since college. I've run three 5Ks so far, and am currently signed up to run a 5K, a 6.5K and 10K in May (not certain I'll be able to run the whole 10, but that's ok). I never would have dreamed of doing that a year ago, or even 10 or 15 years ago. I do exercises and workouts that people much younger than my 48 years struggle with. I'm so grateful for all of that. I KNOW that the Lord helped me get here! So how do I stay focused on gratitude for this miraculous, if aging, body that I have been given, and the positive changes He has helped me to make to it rather than picking it apart? That's what I'm struggling with....and currently obsessed with figuring out