What is the difference between confidence and over confidence?

According to me,

Confidence:it is based on our abilities and strength if we are planned for a particular work with a positive manner then we say yes I can.

Over confidence:it is based on the previous success on a particular work on that success whether he or she commited that they can do in a very relaxed manner it is good to have a look back the previous achievements and success it gives a great strength and positivity in ourselves but it is more important to focus on the present work and should be analysed by your own whether the work can be finished or not based on your work abilities.

I will work hard from my side to clinch the job that is called confidence.

I am a born achiever and I will outcast everyone who comes in my way to clinch my job that is called overconfidence.

Confidence :- I can do it. It's my confidence.

Over confidence :- only I can do it. It's my over confidence.

I did a work, I get the achievement (confidence).

I didn't do any work but I get the achievement (overconfidence).

Confidence is believing yourself and try best to prepare for the achievement of a goal.

Over-Confidence is considering yourself only in order to neglect other things totally without even preparing for the goal.

Confidence =I am perfect for this job (reality).

Overconfidence= Only I am perfect for this job (illusion).

Sir. I believe. Confidence is. When you have a goal. You work hard for that. And believe that. When do nothing for your goal, And still, believe that. Then this called overconfidence.

Confidence is all about your real capabilities. According to your determination, you could make yourself confident. Confidence is good. You should always be confident but overconfidence is like that which keeps us back, pulls down. When we think only I can do this I can make this, nobody is there like me, nobody can make this except me then what will happen! Nothing. It destroys us. People may fun of us. They may be sledging behind our back and which will pull us down.

Confidence: buying a ticket and waiting for the train on the platform is confidence.

Overconfidence: Anyhow I have bought the ticket, so the train would come to my house to pick me up is overconfidence.

If a person is confident then he or she is increase his or her efforts towards his or her goals but if a person is overconfident then he or she decrease his or her efforts towards his or her goal. If a person is confident then he or she is more determined towards his or her goal but if a person is overconfident he or she will take his or her goal very lightly.