According to the Baidu Library query, the famous sayings about bosom friends are as follows:

1. When high mountains and flowing water meet bosom friends, it goes without saying that a smile will appear on your face.

2. Talking with a bosom friend and listening to a bosom friend does not mean not talking with a bosom friend.

3. In life, no matter how many friends you have, how can you compare to a bosom friend. A bosom friend is someone who understands and knows your inner thoughts. One bosom friend is enough.

4. A person who knows the sound knows the heart. If you can understand someone as a person and know how to use their heart, you are a close friend. The heaven, earth and universe are vast and far away, thousands of miles away, and even thousands of years later, there should be people who know it. Even if there is no one in the world, there are still mountains, rivers, flowers and trees, listening silently. But if you understand my meaning, you can be a close friend.