Self Confidence vs Self Conceit

There is just a line between self confidence and self conceit.

Yes, you may have the knowledge. But respect others who may not have.
No questions to be allowed if you have no knowledge about it. Then how did you first learn when you know nothing?

Yes, you may be great. But there will always be people who are greater than you.
And sure there are more that deserve respect from me.

Self confidence you may have. Self conceit is a sure trait.
The line you have crossed. The respect you have lost.

"Blessed are they who see beautiful things in humble places where other people see nothing. "
- Camille Pissarro