Belief is a personal decision for which every person is responsible in this world and the hereafter. Still the world is full of people who do not believe. They there are people who believe but not completely. Those who concern themselves with call and invitation will tell us the situation in which beloved Prophet (PBUH) used to find himself is not uncommon even today. Believers would like their brothers outside the fold of Islam to believe. And this worry puts them in the same situation as beloved Prophet (PBUH).