The quote would be
"Every man is like the company he is wont to keep."
What is the meaning of "he is wont to keep" in this quote? Merriam-Webster translates wont as accustomed, used or inclined, apt, but it still doesn't make sense to me.
It simply means that "We are (become) like the company we keep". The word "wont" is a Middle English word, so it is an old usage. It generally means most often or habitually (for any reason - habit, inclination, desire, or forced).