A man is known by the company he keeps

ضرب المثل
A man is known by the company he keeps
معنی: 

Your friends play an important role in how people think about your personality and character. So you'd better be careful when making friends.

اینکه مردم چگونه درباره شخصیت تو فکر کنند بستگی زیادی به دوستانت دارد. پس بهتر است مواظب باشی با چه کسانی معاشرت می کنی.

معادل فارسی: 

بگو دوستت کیست تا بگویم کیستی.

مثال: 

Lisa said she had seen you with Mickey and Joe again. I've told you many times that those boys are famous for bothering all their neighbors. Everybody thinks you are like them. You know well that a man is known by the company he keeps.

معنای کلمه به کلمه: 

انسان از روی دوستانی که دارد شناخته می شود.