In Romeo and Juliet, Friar Laurence advises Romeo to be patient and calm in the face of adversity. He also provides him with a plan to reunite with Juliet. The Friar's advice is evident when he says, "Hold thy desperate hand: Art thou a man? thy form cries out thou art: Thy tears are womanish; thy wild acts denote The unreasonable fury of a beast." (Act 3, Scene 3). The Friar urges Romeo to act like a man and not let his emotions control him. He tells Romeo that he has much to be grateful for and that he should be patient and calm.
Additionally, Friar Laurence's plan for Romeo to reunite with Juliet involves faking her death using a sleeping potion. He tells Romeo to go to Mantua and wait for Juliet to be sent to him after she wakes up from the potion. The Friar says, "Take thou this vial, being then in bed, And this distilled liquor drink thou off; When presently through all thy veins shall run A cold and drowsy humour, for no pulse Shall keep his native progress, but surcease" (Act 4, Scene 1). This plan seems to be the only way for Romeo and Juliet to be together, and the Friar believes it will bring an end to the feud between their families.
However, as we know, the plan ultimately fails, and both Romeo and Juliet end up dead. The Friar's advice, while well-intentioned, contributes to the tragic outcome of the play. His advice to be patient and calm, while important, also leads to Romeo delaying his actions, and the Friar's plan to fake Juliet's death leads to a series of misunderstandings and tragic consequences.