I came across this verse today.
I actually heard it quoted earlier in the week, but the person who quoted it did not say that it was from the Bible.
1 Corinthians 8:2
If anyone imagines that he knows something, he does not yet know as he ought to know.
In other words, no matter what you think you know,
there's always room to know more and
to know what you know more clearly.
Say that ten times fast!