welcome too, warda, what a cute name!
(in arabic it means 'flower')
what it means is that we don't find a fixed interpretation of something and then say
'we will always interpret verse X to mean Y for all time and in all places'.
it means there is often a deeper meaning (definitely NOT deliberately hidden),
for example in isaiah 7, there are prophecies about the exile of israel intertwined with the prophecy about Jesus;
'the virgin shall conceive and bear a Son'.
so, if someone interpreted it at different times in history, they would understand different parts of the prophecy.
as for the original question, i don't have any specific quotes, but i know that there is nothing dodgy in the Bible,
just a lot of stuff that is difficult to understand, so we need the help of the church to get it right