Romans 1:20Thr Bible itself wasn't around when Christianity began.
There wasn't any Bible for anyone to read.
Who was the authority, then?
What happens if one is illiterate?
He is automatically condemned because he can't read?
How about the person who never heard of the Bible?
Their salvation is impossible?
The Church is the only authority that's ever existed. Nothing has changed. It's still the authority.
For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
The Bible is the living Word of God it has the answers.