One of the common protestant claims raised in a conversation about Sola Scriptura (and its implicit denial not only of Sacred Tradition but also of the Interpretive Authority of the Church) is that the Bible is simple, easy to understand, and that Scripture needs no interpretation OR just interprets itself. This is referred to as the ʻPerspicuity of Scriptureʻ.
Like other arguments brought up in defense of Sola Scriptura this argument is NOT supported by Scripture. In fact The Bible warns us that it is easy to MISINTERPRET Scripture
" As also in all his epistles, speaking in them of these things; in which are certain things hard to be understood, which the unlearned and unstable wrest, as they do also the other scriptures, to their own destruction. " (2 Peter 3:16)
The Holy Church is the sole authoritative interpreter of Revelation and is our proximate guide to understanding and interpreting Scripture lest we twist it to our own destruction! Thank God for Holy Church!
For rules for Catholic Biblical Interpretation check out THIS POST
To learn about the problems with Sola Scripture check out THIS POST