Now this he said not of himself: but being high priest that year, he prophesied that Jesus should die for the nation;

Caiaphas did not say this on his own. Instead, as high priest that year, he was prophesying that Jesus would die for the nation,

And this he said not of himself, but being chief priest of that year, he did prophesy that Jesus was about to die for the nation,

But this he did not say of himself; but, being high priest that year, prophesied that Jesus was going to die for the nation;