'Void' in the Bible

But [in fact] their minds were hardened [for they had lost the ability to understand]; for until this very day at the reading of the old covenant the same veil remains unlifted, because it is removed [only] in Christ.

But I have sent the brethren, in order that our boasting about you may not be made void in this respect, in order that, as I have said, ye may be prepared;