Ephesians 4!

4:2
" be completely humble and gentle;be patient  bearing with one another in love. Make every effort to keep the unity of the spirit through the bond of peace

You may ask.

Why do we have to bear with each other? Well simple because in John 13:34-45,

A commandment is given from Jesus!

"a new  commandment I give to you: love one another  as I have loved you,so you must love one another.By this all men will know that you  are my disciples,if you love one another "

Furthermore we should not habour anger toward a person

Ephesians 4:26-27

"in your  anger do not sin: do not let the sun go down while you are still angry,and do  not give the devil  a foothold."

We often sin in anger because anger causes us to be unconscious  of our actions.The devil knows this and will not fail to use this area to control us!