Filling the Void Once Sin Is Removed

How can we fill the void that is left once we have removed sin (leaven) from our lives? In what ways can we concentrate on replacing sin with the character and righteousness of Jesus Christ?

Raised in Minnesota on a farm with my parents and a sister. Graduated from high school in 1959. Entered Ambassador College in 1965 where I met my wife Judy and married January 19, 1969.