Corruption

Bad company corrupts good character.

1 Corinthians 15:33

Corruption, makes good things impure. Corruption is the pathway for destruction. The source of the Corruption is the devil himself. It all started at the Eden Gardens, when satan corrupted the mind of Eve which lead to sin.
This is a strong weapon that devil uses to destroy us from within.
He makes us implode from within by sowing the seed of corruption.
He puts unnecessary corrupt thoughts and make us fall, make us walk in wrong path, make us believe in a lie.
Most of the time the devil sows corruption through his agents, that is people around us who do not truly love the Lord Jesus Christ.
This is what happened in the church at Corinth. That is why apostle Paul warns us about bad company, because it corrupts our good nature and the good plans that God has for us.
Hence it is important who you hang around with most of the time. As believers in Christ Jesus it is important to hang around with the Holy Spirit most of the time and learn to hear His voice rather than the voice of others who don't know the Lord.
Beware corruption can destroy you inside out, hence don't give room for it.