They have been cultivated by his family believed. They do so based on the belief that they were lucky. And avoid the belief that they meet with misfortune.
They have been cultivated by his family to believe it. They chose to follow the belief that they found good luck and avoid to follow the belief that making them meet the unfortunate.
They have been taught by his family, I believe, that they can choose to follow the belief that they were found to be in accordance with good luck and to avoid the belief that they found the unfortunate