I couldn't figure out the nature of their mission.

He and his crew had long since stopped dwelling on the nature of their mission.

Appropriate given the nature of my mission, don't you think?

If the nature of their mission were discovered, would that make her a spy?

"What may I ask is the nature of your mission?"

But the nature of our mission has now changed, I would think.

And given the nature of our mission, those skills would be of even more use.

Still, George couldn't justify letting any more people know the true nature of their mission.

It did not properly highlight the nature of the church or the church's mission to the world.

During this trip, events drastically changed the nature of his mission.