What is the difference between being proud and cocky?

The first day of work….
I am impressed that I still manage to work pretty well today... especially after 4 days of "unused" brain.
Usually, I will forgot a lot of stuff after a weekend break.
So, the brain is still functioning and working "not bad" - I solved a couple of issues in the morning.

Heheee... but I think some people might say that I am being cocky about the "bragging".
But I seek otherwise... cocky is the word for people who do not know where to put a stop line and keep bragging (non-stop).
Me? I believe I know where is the line; as I know and very well aware that I do NOT know everything.

One must know where their limit is.:-
If you are good at it, be proud of it.
If you are NOT good at it, learn and strive for better.

Again, saw this phase from somewhere – “Your mind works like a parachute; it will ONLY works when it is open”.

Let me know if you have an interesting answer to the question: "What is the difference between being proud and cocky?"

Ok, here is the really cocky one who thinks he is the boss in the household...But he still have to give way to me when I am around.... hehehee....
Oh gosh.... He's seven now... Not sure how many more years he has.
I will treasure every single day. He is my darling who changes my life - in good /bad.