It is not as simple as that.

The law said that 2+2=4 and this was the accepted jurisprudence but now he is saying that 2+2=5 because he wants and he can do that because he is a supreme court judge and his decisions legally are the new accepted interpretation of the law.

It's a flaw in Brazilian political that enables supreme court judges to virtually do whatever they want including legislating because they can pick any law and bend it. In a healthy system the supreme court would be challenged by the senate but this doesn't happen because most senators are corrupt and it is the supreme court who judge such cases.