The best companion
خَيْرُ الْأَصْحَابِ عِنْدَ اللَّهِ خَيْرُهُمْ لِصَاحِبِهِ، وَخَيْرُ الْجِيرَانِ عِنْدَ اللَّهِ خَيْرُهُمْ لِجَارِهِ
Khayru-l-ashabi 'inda-llahi khayruhum li-sahibih, wa khayru-l-jirani 'inda-llahi khayruhum li-jarih.
"The best of companions with Allah is the one who is best to his companion, and the best of neighbours with Allah is the one who is best to his neighbour."
Narrated by Abdullah ibn 'Amr. Jami' at-Tirmidhi 1944 (hasan sahih)
A short reflection
Two tests of the same principle. Excellence is relational. It only shows up with another person in the frame.