I've been curious about the part in Exodus 4:10 where Moses says that he is slow of speech and of tongue. I didn't understand what that meant.
I'm not sure either, but I think the take-away lesson from it is that God will never ask us to do something that He won't give us the ability to accomplish. We need not hesitate, procrastinate, or second guess God's will, desire, and plan for us. A passage that comes to mind:
2 Corinthians
12:8 For this thing I besought the Lord thrice, that it might depart from me.
12:9 And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me.
12:10 Therefore I take pleasure in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ's sake: for when I am weak, then am I strong.
Godspeed