Romans 1:32
These people know that God's decrees require that those who practice such things deserve to die [i.e., either spiritual or temporal punishment], yet they not only do the same things [themselves], but even approve of other people who practice them.
Romans 12:9
Let [your] love be sincere. Hate whatever is evil. Cling to whatever is good.
1 Corinthians 15:33
Do not be fooled; bad company ruins good moral behavior.
2 Corinthians 6:14-16
Do not team up with unbelievers [i.e., in close relationships, such as marriage, etc.]. For what do righteousness and wickedness have in common? Or, what fellowship can light have with darkness?
Revelation 2:4
"But, this is what I have against you, that you have forsaken your first love [i.e., love for Christ and His church].