Why would anyone say this? Who would say it? And why? The world’s grown honest? When has that ever been true? No disrespect to the world but it seems that honesty and deception are as cyclical as night and day or the seasons. Or perhaps are as intertwined as oxygen and carbon dioxide and perhaps as much the air we breathe.
Is there a period of history any more honest than another? What can Rosencrantz be trying to do with this line? Is he trying to deflect his own deception by claiming that the whole world is more honest and therefore he is with it? It is a very curious thing to say to anyone, particularly one’s friend you’ve been sent to spy on.
The Hamlet Project 
That’s why the sentence is ironic 🙂 Is your Act V on the way? I hope so 🙂
It is! I’ve written most of it already, actually. It’s just taking me a while to upload. But knowing you’re waiting for it will help speed me along.