This rule is expressed in these words spoken by Jesus during his Sermon on the Mount: “All things... that you want men to do to you, you also must do to them.
٦ كَيْفَ يَرْتَبِطُ عَمَلُنَا ٱلتَّبْشِيرِيُّ بِإِظْهَارِ ٱلْمَحَبَّةِ لِقَرِيبِنَا ؟‏