Fan Ch'ih asked about benevolence. The Master said, "It is to love all men." He asked about knowledge. The Master said, "It is to know all men." …
樊遲問仁。子曰、愛人。問知。子曰、知人。
Analects 12.22
The same idea in other traditions
The One God is our father; we are the children of the One God. You are our Guru.
Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.
Giving and righteous conduct, kindness to relatives, blameless deeds: this is the highest blessing.
By doing service he acquires the Karman which brings about for him the nâman and gôtra of a Tîrthakara.
Shammai said, Make thy Thorah an ordinance; say little and do much; and receive every man with a pleasant expression of countenance.
Kind words and the covering of faults are better than charity followed by injury. Allah is free of all wants, and He is Most-Forbearing.
Alike the drunk and the strict of fare / For his mistress yearns—in the mosque Love doth dwell / And the church, for his lodging is everywhere. …
'Now that which is that subtile essence (the root of all), in it all that exists has its self. It is the True. It is the Self, and thou, O Svetaketu, art it.'