Buddha on the importance of friendship:
On one occasion the Venerable Ananda, the Buddha’s attendant, came to the Buddha and said that in his view half the spiritual life revolves around spiritual friendship. The Buddha immediately corrected him and said, “Do not say this, Ananda! Do not say this, Ananda! Spiritual friendship is not half the spiritual life. It’s the entire spiritual life!” Then, with reference to himself, the Buddha added, “In this whole world, I am the supreme spiritual friend of living beings, because it is in dependence upon me, by relying upon me, that those who are subject to birth, old age, and death become liberated from birth, old age, and death.”
Guru Nanak on how to recognize a "holy person" (MacAuliffe's Chapter 11)
The Guru replied to a man called Kalu who had asked him for a definition of a holy man: 'Recognize him as holy in whom are to be found friend ship, sympathy, pleasure at the welfare of others, and dislike of evil company. In the first place, the intentions of holy men are pure. Secondly, they are pleased on hearing the praises of others. Thirdly, holy men serve the virtuous. Fourthly, they honour those who can impart to them learning and good counsel. Fifthly, as there is a periodical craving for food or intoxicants, so they feel a craving for the Guru's word and for divine knowledge. Sixthly, they love their wives, and renounce other women. Seventhly, they avoid subjects from which quarrels may arise. Eighthly, they serve those who are superior to themselves in intelligence or devotion. Ninthly, even if strong, they are not arrogant, and trample not on others. Tenthly, they abandon the society of the evil, and only associate with the holy.'