People should choose peace over violence.
A few examples to support my theme are...
One pain is lessened by another's anguish;
Turn giddy, and be holp by backward turning;
Take thou some new infection to thy eye;
And the rank poison of the old will die"(R&J 1002). This quote shows that you should just move on than grieve about it.
Its is again a lot more wise to make peace than to be violent.