O sweet Juliet! / Thy beauty has made me effeminate," (III.i.112-114). If Romeo and Juliet were not married then, Tybalt would not have slain Mercutio; Romeo would not have killed Tybalt and so Romeo would not have faced banishment. Therefore, Friar Lawrence was the mastermind in Romeo's banishment, since he started the tragedy by secretly marrying the title characters. .
Even after Romeo was banished, Friar Lawrence did not see the consequences of the marriage, and moreover made a risky plan to reunite the fated lovers. In order to avoid Juliet's marriage with Paris, the priest offers Juliet a vial to drink as part of his hasty and shortsighted plan. Friar Lawrence said this to the threatening Juliet in front of him: .
Hold, then; go home, be merry, give consent:.
To marry Paris: Wednesday is to-morrow: .
To-morrow night look that thou lie alone; .
Let not thy nurse lie with thee in thy chamber: .
Take thou this vial, being then in bed, .
And this distilled liquor drink thou off; (IV, i, 89-93).
In plain words Juliet will take a sleeping potion that will make her appear dead so her marriage with Paris will be avoided, meanwhile after receiving a letter from the Friar Romeo would return to Verona from Mantua and would be with Juliet when she wakes up. The Friar made the plan in such a hustle that he did not think about the possible failures of the plan or an alternate plan. After the plan was created many unfortunate events took place; firstly, Juliet marriage was changed to a day earlier and later the letter never reached Romeo. Both these events showed that the friar did not understand the significance of the plan himself. He told Juliet to drink the potion on her wedding day and made his letter to Romeo the basis of the plan, however he did not make sure that Romeo gets the letter. When Friar John returned from Mantua and said: "I could not send it,-here it is again,- / Nor get a messenger to bring it thee, / So fearful were they of infection" (IV.