If in thy wisdom thou canst give no help,
Do thou but call my resolution wise,
And with this knife I’ll help it presently.
(shows him a knife)

In a private meeting with Friar Lawrence in Act 4, Scene 1, a distraught Juliet makes this emotional response to him after he tells her that he’s been told that she must marry Paris in a couple of days and that there is no way to stop it. She says that she doesn’t want to hear about that marriage unless it can be stopped and says that she will kill herself unless Friar Lawrence can come up with a solution to her predicament.

Give me, give me, O tell not me of fear!

At the end of Act 1, Scene 4, Friar Lawrence describes his elaborate plan to have Juliet fake her death to avoid marrying Paris so that she and Romeo can be together. After laying out the plan, he patronizingly warns her that his plan will work as long as she doesn’t change her mind or become scared—like a woman ("If no inconstant toy, nor womanish fear, / Abate thy valor in the acting it")! Juliet’s response here suggests that he is aware that Friar Lawrence is underestimating her strength.