'Evil' in the Bible

See to it, brothers and sisters, that none of you has an evil, unbelieving heart that forsakes the living God.

But solid food is for the mature, whose perceptions are trained by practice to discern both good and evil.

"For I will be merciful toward their evil deeds, and their sins I will remember no longer."

let us draw near with a sincere heart in the assurance that faith brings, because we have had our hearts sprinkled clean from an evil conscience and our bodies washed in pure water.