Galatians 5:14-15 (NIV)
14The entire law is summed up in a single command: “Love your neighbor as yourself.”
15If you keep on biting and devouring each other, watch out or you will be destroyed by each other.
Luke 6:45 (NIV)
45The good man brings good things out of the good stored up in his heart, and the evil man brings evil things out of the evil stored up in his heart. For out of the overflow of his heart his mouth speaks.
Matthew 7:1-5 (NIV)
1“Do not judge, or you too will be judged.
2For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you.
3“Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye?
4How can you say to your brother, ‘Let me take the speck out of your eye,’ when all the time there is a plank in your own eye?
5You hypocrite, first take the plank out of your own eye, and then you will see clearly to remove the speck from your brother’s eye.