How does Shakespeare contrast violence with love in Act I Scene 5?When Tybalt spots Romeo trespassing in the Capulet Mansion.

This is the scene we have all been waiting for - Romeo and Juliet meet and fall instantly and hopelessly in love with each other at the party at the Capulet house. However, amidst this blossoming of love, the ever threat of violence is present, as Tybalt recognises the voice of Romeo and goes to get his sword, and is only prevented from doing so by his uncle. It is highly significant that at the same time that Romeo and Juliet get together, Tybalt's rage is provoked against Romeo, triggering events which will eventually result in Romeo's banishment from Verona. How tragic that in the very happiness that initiates the start of their relationship should also lie the seeds of their future sadness. But then I guess it isn't called a tragedy for nothing!