I questioned it because I don’t trust you.
As someone who was born in the late 60’s, I had never heard of it. After finding it in the Catholic Encyclopedia, I have no problem with it. Can I be Catholic now, Rightousone.
One point I would make though, after reading it, everything in it is elucidated in the Catechism, so of course by accepting everything in the Catechism, I accepted this creed before I even read or knew about it. Which also goes for any Catholic who faithfully follows all the teachings of the Church who has not heard of the creed of St. Athanasius. I am sure there are many.
So, the question is, what make you a faithful Catholic? Knowledge of a certain creed? Or believing what it says even though you never heard of it?