I think this is coming from the Henry Ford quote, which is "Whether you think you can, or you think you can't--you're right."
This quote basically means that what you think you can do is all in your mind and how you perceive yourself. if you think you can do something, then you'll be able to do it. If you think you can't do something, then you won't be able to, because you have already given up in your mind.
Does that make sense?
Answer:
かたやたさたやたやたなやたさたやたはたさたらたはあ
Explanation:
Rose asks Troy why he will not let Cory play football when Cory is trying to follow in his father's footsteps. Troy explains that when Cory was born, he decided he would not allow Cory to pursue sports in order to spare Cory from a fate like his own.