93 Preface ۞ إِنَّمَا السَّبيلُ عَلَى الَّذينَ يَستَأذِنونَكَ وَهُم أَغنِياءُ ۚ رَضوا بِأَن يَكونوا مَعَ الخَوالِفِ وَطَبَعَ اللَّهُ عَلىٰ قُلوبِهِم فَهُم لا يَعلَمونَYusuf Alihe ground (of complaint) is against such as claim exemption while they are rich. They prefer to stay with the (women) who remain behind: God hath sealed their hearts; so they know not (What they miss).1Cf. 9:87, where similar phrases are used for similar shirking of duty by townsfolk, while here we are considering the desert folk. It is not only a duty, but a precious privilege, to serve a great Cause by personal self-sacrifice. Those who shirk such an opportunity know not what they miss.