Walking and positive thoughts

  So I walk, I decided this spring that I was too fat and I worked in an office job, at a desk all day. I was coming home sore every day..and not getting any healthier. So I walk, I started out at a mile a day, now I'm up to 3.5 miles a day and I've lost 20 ponds. I could stand to lose a lot more but at least I'm better than I was. I like my shadow(which I'm having an awful time getting a good pic of) and my dogs are healthier too. 

My walking buddies for today, I don't usually take all three of them together, but the ones left behind go ballistic and try to get out the fence, so I gave it a shot.  Made it back, no blood was shed, and but for a blister on my finger we did fine.  Usually if I have all three I make one of my kids go too so they can handle a dog.  Luckily two of them are small so it's not too much work.  

That brings me to the Positive thoughts, I have to admit not all my thoughts were positive while walking my three dogs, but usually I try.  I see on my facebook newsfeed a few of my 'friends' must have taken a challenge or something where they have to post 3 positive thoughts everyday.  Now I do understand that this is actually a challenge for some people, as this is what I've been told, and especially with Robin Williams dying recently of suicide, but I just can't fathom not being able to have at least one positive thought everyday.  It must be absolutely awful to have to live that way.  I don't have an easy life, and I can't say that it has ever been stellar, but let's just talk about the last couple years.  My husband died of brain cancer, I was laid off because of downsizing from my full time job, and my landlords decided they want me to move out so they can sell the house that I live in.  Maybe I'm just lucky, maybe I don't have whatever gene it is that keeps people in the pit of despair.  Have I gotten depressed before, sure, but not long lasting, devastating depression.  There is just too much beauty in this world that lifts my spirits to be stuck there.  A beautiful sunset/sunrise, a blooming rose on my rosebush, a pretty butterfly, puppies, my beautiful kids, the fact that I wake up and take another breath everyday.  Yea I have plenty of crap to get down in the dumps over, and sometimes I get there, I just don't have the time to stay. Life moves incredibly fast, if you don't move with it the best moments are lost forever and you can't get them back.  I'm not trying to hurt anyone's feelings, I just don't GET it...I just don't, and I don't think it's something you can make people understand unless they've been there.  I am incredibly sad that the world lost Robin Williams, where was his support system?  Didn't he have anyone to talk to? No one?  Such a tragedy.