a man is known by the company he keeps

Proverb

People are similar in character to their friends.

Japanese Meaning

その人は、友人や仲間によってその性格や本質がよく現れる / 付き合う人々が、その人の性格や評判を映し出す

After the scandal, townspeople nodded sadly and muttered that a man is known by the company he keeps.

人は付き合う相手によってその人柄がわかる。

Sense（1）

People are similar in character to their friends.