I believe he is saying that. She is only 17, she is young and even though she has her whole life ahead of her he can already see there is something extraordinary in her that cld make a difference in the world. He believes she will be all she is meant be and the weight of the world or noone can hold her back from shining. He is reminding her to listen to her heart so she will be capable of changing the world! :) He believes in her.