We can't say that until we see for ourselves about whether we'll understand it or not, most people escape from understanding anyway, not even giving it a chance don't they? The reasons could be that their not understanding gives them pleasure, that understanding is too painful etc.
About knowing though, we just have to examine don't we?
I'd draw a line between knowledge and understanding.
And yes, questioning brings issues to attentiont, awareness of them, something necessary for understanding to begin with.