Here's the context:
* Friar Laurence has just learned that Romeo didn't receive his letter explaining the plan to fake Juliet's death. This is devastating news, as he knows Romeo will likely take his own life upon hearing of Juliet's supposed demise.
* The Friar's line about the "stronger cord" signifies his growing despair and desperation. He feels a heavy weight of responsibility, knowing that his plan has failed, and he is now powerless to prevent the tragedy unfolding.
It's important to note that the line about the "stronger cord" is often misinterpreted as a request for a tool to break into Juliet's tomb. However, the line's context within the play makes it clear that it is a metaphorical expression of the Friar's mental anguish.