'Forbidden' in the Bible

But sin, finding an opportunity through the commandment [to express itself] produced in me every kind of coveting and selfish desire. For without the Law sin is dead [the recognition of sin is inactive].

I know and am convinced [as one] in the Lord Jesus that nothing is unclean [ritually defiled, and unholy] in itself; but [nonetheless] it is unclean to anyone who thinks it is unclean.