Genesis 37:11 And his brothers envied him, but his father kept the matter in mind.
When Joseph started to have prophetic dreams that were telling of things to come his brothers did not like what was being said because they could see a pattern emerging that would mean they would have to serve him!
He was the youngest and should have had to look up to them, but these dreams were saying the opposite!
It was only his father who could see that these were coming from God and that they should be observed, believed and kept in their hearts. So that is what he did – he kept them in his heart.