Answer: Don't Tell Them They're Wrong, Rely On Evidence, Don't Say You're Envious Of Them
Don't Say You're Envious Of Them.
Help Them Find The Roots Of Their Insecurity.
Reassure Constructively.
Give Them An Object To Come Back To.
Realize That Even High Achievers Feel Like This.
Explanation: Just tell them that just to be her self everybody is different.