Where does your strength come from?

I can do through him who gives me strength.  Philippians 4:13 

Do not be anxious about anything, but in everything prayer and petition...
Phil 4:6

Do you remember the story about Jesus walking on water and Peter saying "Lord if its you, tell me to come to you on the water." "Come." he said. And Peter went but about half way there he did what? Began to sink.  Why? Jesus has the answer.  "you of little faith," he said, "why did you doubt?" 

    Well, why do you doubt? Better yet why do I doubt?  Why in somethings I am completely confident in the Lord and others, I have faith but not complete faith?  Even when, I know all the promises sometimes I find myself very fearful. 
     You might even know I am but, but I am trembling on the inside.  When I am with peers, whew! Tough place to be.  The whole time I am thinking about things that so should not matter.  You know like, do they like me? Do my clothes look okay?  What are they really think about me?  Really no offense but do those things really matter. No, I am sorry they don't.  The only people I need to be worried about what they think is God and my family.  I am doing what I need to for those people.
   Others things I have been doing practically my whole life, like teaching swimming lesson.  Are they really learning, I am doing this right?  The answer is yes! Quite doubting yourself.  This is a God given talent. I am I doing my best, wait is what I said really wrong.  Well, there is a saying if you are going to be wrong, you might as well be confidently wrong. 
   As I was watching my sweet oldest child, doing something she has done for over half of her life, she still had that shyness, that fish out of water look. I felt bad for her.  I wanted to tell her, be commanding in your presence.  Don't doubt yourself! Get out there, and do it.  But then, I look and see me. I want to run out and tell all my secret promises I know.  She knows them well, I share them often. 
   There is comfort in a God who strengthens you in your weakness.  There is peace in a God who has planned your every step for the day.  He knows what we can handle, and what we can not.  He will never leave us, with something to hard.  It might seem utterly and impossible, but that is where you and I need to say.  Stop, I know I can do this through him who strengthens me.  I all things, not just the tough stuff.  But every step is done with help, from someone.  Do you know who that someone is?