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