friendship
A quote by Aristotle.
A friend is a second self.
Related
Once harm has been done, even a fool understands it
I want to know His thoughts, the rest are details
Those that know, do. Those that understand, teach
Everything that I understand, I understand only because I love
All truths are easy to understand once they are discovered; the point is to discover them
Everything should be made as simple as possible, but not simpler