conceptualization

First a set of ideas forming in the brain will be classed together loosely because we see some connection between the ideas.
Secondly a word, sometimes we create the word or some word already in use, will be connected to these set of ideas.
Then a proper concept is made. You will start to see the light in the end of the tunnel.
The other method is not as productive as this, someone give you the word first and then explain the meaning of it. You may get the concept but not so firmly as the first method.
By the first method you will expand the meaning of the word.

Arrow of time

It is accepted the arrow of time direction from past to future cannot be proved by any concept of physics except entropy. Concept of entropy is a statistical one.

My contention is that arrow of time is a concept created by our brain. Take two astronomical happenings like the big bang and creation of the solar system. Which happened first? We say big bang. How come we know it happened first? There's no proof except our understanding.