Not all you think, is right and generous. Insecurities come out of fear.
How to overcome that fear?
Embrace the other and accept his or her proposal, even if at first sight you have doubts of the intention or of the capability.
Embrace the other with the different way of doing.
Embrace the new way of doing and look at the detail and you will see that every person will teach you new things.
You don't know it all.