Answer:
I never believed that someone could be truly cold-hearted. I thought that even the worst people must have had some amount of good in them. Once I first heard about (random name), though, my thoughts started to change. Hearing about the savagery of their actions was the start. Then I saw (random name) for the first time. They were swaggering down the path in an uncaring but confident manner, as though they had done no wrong. I stood tongue-tied, watching them get closer and closer, then I realized (random name) was walking towards me!
Macbeth's "tomorrow and tomorrow and tomorrow" speech in Act 5, scene 5 acts as Macbeth's farewell. In it he thinks about the meaning of life and decides that death is something that comes to everyone, people are all just walking the earth with no importance. "Signifying nothing" at the end refers to man's life, it means nothing, according to Macbeth. He relates a person's life to an actor who plays a part on a stage for a couple hours and then disappears, doesn't exist anymore.
This speech shows that he has essentially given up (in his mind) and thinks that life is meaningless.
