Cantarella you base your entire faith on what others say, instead of trusting God.
The definition of "visible" is: Something that can be seen or noticed, or someone or something that is well-known or in the public eye.
Everyone here at least sees, reads and believes the Catholic teachings as taught, well at least most Catholic here.
We have the Deposit of Faith and writings of all the past popes. THEY ARE seen and NOTICED, by those who are seeking Truth.
St Augustine says, even if only a few people in the entire world have the Faith, there is the Church.
If, however, you prefer to believe that the Church magisterium is compiled of heretics, that alone is a heresy, you are saying right there, that God failed.
Just because heretics and MODERNISTS possess the buildings, are you saying they are the Church?
This era is the age of FAITH, we must Trust in God and have Faith that He is the Head, as He has always been, not the Modernists, just because they possess the property of the Church, the property is not more important than the teachings. That is what SSPX is starting to believe.
It is Protestantism to believe as SSPX, because they can't even agree on the fasting laws for the reception of Communion, some SSPX chapels say it is three hours, and some say it is one hours. Proof that there is NO POPE, to unite them.