# He who doubts is condemned if he eats

"God will say that a person does wrong if he is not sure if it is right to eat a certain food, but he eats it anyway" or "A person who is not sure if it is right to eat a certain food, but then eats it anyway, will have a troubled conscience" 

# because it is not from faith

"and God will say that he is wrong because he is eating something he believes God does not want him to eat" 

# whatever is not from faith is sin

"you are sinning if you do something that you do not believe God wants you to do"