"If anyone of you knew what is wrong with being alone, no one would travel at night by himself."  

قَالَ رَسُولُ اللَّهِ ﷺ لَوْ يَعْلَمُ أَحَدُكُمْ مَا فِي الْوَحْدَةِ مَا سَارَ أَحَدٌ بِلَيْلٍ وَحْدَهُ