Confused

"Things" in the plural refer to the state of what's going on.

Only the first works.

unprlldWhen things get ordinary,I back off.
When thing gets ordinary,I back off.

I'm confused in knowing the difference between the two.Please,tell me the difference between the sentences.

The second sentence is not correct. thing is countable, so it must have an article:

When a thing gets ordinary, I

What does the second one means,humbly.

Sorry, I just posted without seeing the answer by CJ.

unprlldWhat does the second one means mean?

I don't know. That's my question, too. I can only guess. Maybe this:

When a thing gets ordinary, I back off. ~
When something is no longer new and exciting, I lose interest in it.

CJ

"(You need a space after a comma, and two spaces after a period, by the way.)"

Thanks for the knowledge, Sir. From now I'll take care.
It is really helpful!
I just love to learn through my mistakes.

Even in School nobody pointed out this very mistake, Thanks to you.

Good! That's called making progress!

CJ

Oh! I just saw my notebooks, in them I have written in the same way that you told me. It was a mistake, when I write using keyboard. So, no offense on Teachers.

Thanks again.

Anything else I write wrong while writing text?

Don't worry about it. Continue to post your questions, and people will help you to see your mistakes and correct them. Rome was not built in a day.

CJ