Be patient and forgiving of others' errors.
Matthew 18:21-22
2 Corinthians 6:4,6
Ephesians 4:1-2
Colossians 3:12-13

Show understanding and sympathy to those who are weaker.
Romans 15:1-2
Galatians 6:1

Be winsome; dwell on points of agreement and things you have in common.
Romans 14:19
1 Corinthians 9:19-22

Look for the good in others.
Philippians 4:8
Titus 3:2

Treat others the way you want to be treated.
Matthew 7:2-5
Matthew 7:12
Luke 6:31-33

God is patient and tolerant with us, and we should be so with others.
Psalm 103:8-10
Romans 5:8
2 Peter 3:9