God calls each of us to be and do something. When that call comes, it is very natural for us to simply think of all the reasons why we can't do it. It might be a lack of ability, skill or resources, but we come up with any excuse we can. Yet, those things were never a requirement for the call...
Exodus 4:11-17
God isn't calling you because He thinks you can do it on your own, He's calling you because He knows He can do it through you!