After you were born, life will begin to expose you to different options in the world we live.
First, you will be introduced to your Parents
Your parents will start teaching and controlling how to approach your new world.
They will start exposing you to what they know and what they want you to see.
Then you start to interact with things around you: toys, tv programs, kids play
From here you start seeing how other people interacts with the world and with each other
And then you start school and you begin to correlate things and build your personality as the world presents several options of people's opinions and actions

...this to be continued