There are many such things
● It is not difficult to die for a friend, but it is difficult to find a friend worth dying for (Britain)
● The so-called friendship is that one heart is in two bodies (Europe)
● A friend is the second self
● A wine party. This is the basic principle of people's social attribute (edmund burke)
● Different ways, no common cause
● Comrades are friends < speaking >
● Correspond in unison, and seek the Book of Changes with the same spirit
● Compared with the same kind, respond in unison, and consolidate the principles of heaven and justice < Zhuangzi >
● Those who aspire to the Tao have fewer friends. A well-behaved person should not be close at hand (Jin Ge Hong)
● Simultaneous self-correspondence, knowing each other with one heart (Jin Fu Xuan)
● The same lines converge and thousands of miles follow each other; The line does not tend to be different, but the door is blocked (Huai