Therefore remind in case the reminder profits.meaning, remind where reminding is beneficial.From here we get the etiquette of spreading knowledge, that it should not be wasted upon those who are not suitable or worthy of it.The Commander of the believers, `Ali said,"You do not tell people any statement that their intellects do not grasp except that it will be a Fitnah (trial) for some of them."He also said,"Tell people that which they know. Would you like for Allah and His Messenger to be rejected"Allah said:سَيَذَّكَّرُ مَن يَخْشَى