I have always found it true that the more real talent a person has, the more secure he is in that talent and the less likely he is to be a jerk.
most of the tantrums people throw don’t really come from anger with others as much as from an insecurity within themselves. Some of the nicest, genuinely warm people I have dealt with have been those with the greatest talent and success.
And some of the biggest jerks have been people on the perimeter of success who have bluffed their way to where they are.
The source of the wisdom? Dolly Parton in her autobiography My Life and Other Unfinished Business. As she herself might say, the world has many lessons if you don’t mind listening to a hillbilly now and again.