You become who you hang out with
"Do not be deceived: `Bad company corrupts good morals.'" (1Cor15:33 NASV)
deceived = πλανάω = seduced. to wander away.
corrupts = φθείρω = withers or shrivels. to spoil (as in food)
the CEV puts it this way:
"Don't fool yourselves. Bad friends will destroy you".
was an intellectual and can be seen here quoting a common phrase of the
day from Menander (a Greek dramatist) who in turn had quoted it in one
of Euripides' earlier plays. The Jamieson-Fausset-Brown Commentary tells
us the meaning from the play indicates communion with "those who deny
the resurrection". The Church at Corinth had fallen back into a sinful
state since Paul had left them. And Paul puts some emphasis on the
company they keep for this slippage. Your morality is strongly
influenced by the company you keep. Those who deny the resurrection are
bad company for close friendships.