greatest importance

Of greatest importance to Mubarak, the name Ayman Nour was never uttered.

If one of the pipes broke, it was, for our hero, an event of the greatest importance.

To have, from childhood up, the example and guidance of virtuous parents is certainly of the greatest importance.

Moreover, the Indian declared, he had news for him—“news of the greatest importance”—and begged to be allowed to see him at once.

To the Britons, living a more or less wild life, these things were of the greatest importance.

It was a matter of the greatest importance to them to secure their riches.