The former means that similar things often get together and like-minded people get together, and vice versa. The latter means: be a gentleman with good people and make trouble with bad people. It is easy to turn red near cinnabar and black near smoke and ink. It means that the objective environment has a great influence on people's behavior and ideology. Good things will get better and better together, and bad things will get worse and worse together. However, if the lotus is not dyed, it will leave mud, even if the character is good. There is also a saying that everything has a degree, just like "you won't notice it if you smell it for a long time, and you won't notice it if you smell it for a long time." Once a person stays there for a long time, he will be assimilated and gradually affect your thoughts! As the saying goes: make more friends, make more friends. You can read books about these things. With your best teacher in books and your life practice, you will gradually understand the two words you said above.