Find Peace in Chaos

I wish to tell a story that goes like this:
3 students were studying in a room when suddenly a cockroach appeared in the corner of the room.
It flew and landed on student A's hand.
Student A shouted loudly and shook his hand forcefully. 
Student B started shouting before it flew and landed on student B's hand.
Student B shouted more loudly and shook his hand forcefully. 
It flew and landed on student C's hand.
Student C carried it slowly to the door and flicked it to the street. 
All of them returned to studying after this episode.

I have another amazing experience that I wish to briefly summarise here:
Person D shouted at me unreasonably for choosing to text on the phone than to eat lunch.
I responded with a clear explanation in a calm tone that I am actually settling important matters.
Honestly, I was confused because she was making such a big fuss over small matters.
The next morning, she apologised for shouting at me and asked me to ignore her when that happens again.
I was surprised that she apologised for that because I didn't treat it seriously and I knew she was not in a good mood when she shouted at me.

I wonder what would happen if I have shouted back at her. Things would have gotten worse.

I learnt:
More than the problem, it's my reaction to the problem that creates chaos in my life.

I should not react in life. I should always respond.

Student A and B reacted, whereas student C responded.

In the second story, I responded instead of reacted.

Reactions are always instinctive whereas responses are always well thought of.

Identify problems in your life, then respond to it, not react.