Wisdom from Prophets

The best of friends is he who is best in behavior and character -Prophet Muhammad (PBUH)

Wisdom from Quran

And among His Signs is this, that He created for you mates from among yourselves, that ye may dwell in tranquility with them, and He has put love and mercy between your (hearts): verily in that are Signs for those who reflect (30:21)

Wisdom from Imams

Generosity is to help a deserving person without his request, and if you help him after his request, then it is either out of self-respect or to avoid rebuke. -Imam Ali (a.s.)