Today, yes. The Holy Bible is available for us to have, borrow, own, read, reference and verify what others say.
In the Apostles Day, oops, they did not carry the Scrolls, they did not have an OT complied Book, They did not have a NT compiled Book.
THEY were SENT out to Teach and Preach without Scriptures in hand ...
and assured...—->
John 14:
[26] But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
the church is eternal and always the same as her founder is eternal
1 Tim 1:17