From Abu Darda (radiyallaahu 'anhu) who said that Allaah's Messenger (salallaahu 'alaihi wa'sallam) said:
There is nothing which is heavier upon the balance than the good character.
So by his character the Muslim turns enemies into friends, opponents into companions, and harsh people into those who are mild. Character is a commodity which is almost something rare amongst the people today, except amongst those who sincerely worship Allaah alone, Who are honest and true in the worship of the Lord of the Worlds. So good character refines the soul and enables that: