In other words, let others think that you are capable and useful. Is a reliable person.

I don't want you to show that you are the first, you are the best, and everyone else is scum.

it's actually very easy to understand. Anyone wants to associate with people who can help themselves.

just show your ability appropriately.

it's normal to overdo it and cause others to resent it.

you should know. Showing your ability is not showing off. I think the most important thing is the latter part. "and then establish a relationship of mutual respect and trust"

mutual respect and trust.