The Clarity (Perspicuity) of Scripture

The Westminster Confession of Faith (1.7) explains the perspicuity of Scripture (it's OK charismatics and pentecostals, you can read the WC without going to hell):

All things in Scripture are not alike plain in themselves, nor alike clear unto all.

Yet, those things that are necessary to be known, believed, and observed for salvation are so clearly propounded, and opened in some place of Scripture or another, that not only the learned, but the unlearned, in a due use of the ordinary means, may attain unto a sufficient understanding of them.

...Well yeh, of course!

What all that means is that not everything in Scripture is easy to understand, but what we must understand in order to be saved is clear. It also means that we should be reading, meditating on and praying about what we read.