When you talk about something beautiful, they [unbelievers] become jealous. That is why such things are not told to sick people. It is only said to those sincere, righteous Muslims. They would feel relieved with such news but you should not speak of such good news to those jealous, dangerous people with the characteristics of hypocrites. Refraining from saying such things to such people would be an act of worship. You should hold your tongue, be silent and talk about other things. - Harun Yahya