This is the hardest part for some to cross. I have said "If you're not going to believe what he says, why should he talk to you?" But this hasn't always "worked"--they can't do it somehow. Sometimes I think the less said, the better.
Robert Frost wrote something like this: “It was the nature of the test that you not understand it at the time.”
Makes sense too. If you understand it first, then you know it is for your own good, and if you know it’s for your own good, then you are not doing it for the right reason.
Yup, you have to step out of the boat ONTO the water...