Sig 1: I am nobody... Neither you... We won't be any matter just after a few years later when we die. Enjoy the happiness and sadness for now.
Sig 2: When someone or, a bunch of people makes fun of you. The total time they invested in making fun of you, is the time they couldn't manage to stay focused on their work or, development. If you care about them, let them know. If you don't, then don't bother. Stay focused on your own business.
Sig 3: You did a mistake and then you simply admit it after realizing your fault. This is one of the coolest things ever you can do in your lifetime.