Persevering through the muck

As I've been deep into my training these last few weeks it came up why am I doing this? Why do I want to do this? I mean I could just continue doing the easy 5km runs. I could just be happy with that, but I  realized that I can accomplish so much more. I had so many people growing up tell me I'm not good enough, I'm not worthy, I'm never going to amount to anything. In the last 9 months as I was taking care of my mental health I was encouraged to continue working out. As I was working through those words over me at that moment I decided I can do this. I remember looking at my friend and saying to her I'm going to run a half marathon and she looked at me and said about time, you can do this. So, here I am persevering. Its also funny that this last month in our Kid's Church program it was about a mud run getting through the mayhem. We were teaching about perseverance. The bible verse we learned is
         "but those who trust in the Lord will             receive new strength. They will fly as eagles. They will run and not get tired. They will walk and not grow weak." Isaiah 40:31

So here I am feeling the pressure of I don't know if I can do this, it's too hard. Then i here a voice say I am with you, I'm never going to leave you. It's not a sprint. It's a marathon. At those moments I feel calm and collective and able to keep going. Right now I'm training for halfmarathon then a marathon but it is so much more. It's for the little girl who thought I'm too fat, I'm not good enough, I can never be healthy. But God sees me differently I'm not too fat, I'm good enough and He made me whole. Whatever obstacle you are facing God can move the mountain. I never thought I'd be here in my life doing the things I am conquering but God knew. He knew I would face my Goliath. So here is my question what Goliath are you facing? Be a David, stand up to the giant and conquer it.