When God called Moses to deliver his people, Moses told God Exodus 4:10 And Moses said unto the Lord, O my Lord, I am not eloquent, heretofore, nor since thou hast spoken unto thy servant; but I am slow of speach, and of a slow tongue. 11: And the Lord said unto him, Who hath made mans mouth? or who maketh the dumb, or deaf, or the seeing, or the blind? have not I the Lord? 12: Now therefore go, and I will be with thy mouth, and teach thee what thou shalt say. So, If the Lord be for you, no man or anything else can be against you. They might mock you, call you dumb, but if you are trying to spread the good news of Gods word, he will have vengance upon them, just as he always has. The Lord God always Blesses those that try, Always! So let them laugh, and mock, and we will see who has the last laugh.