Hamlet is seen as being indecisive throughout the first 3 acts of the play which of these lines from acts and show that hamlet is finally focusing on revenge

The lines from acts IV and V that show that Hamlet is finally focusing on revenge are the following:

Which is not tomb enough and continent

To hide the slain?-O, from this time forth,

My thoughts be bloody, or be nothing worth!

(Hamlet, act IV, scene IV)