Deceiving

The Bible is full of stories of people who at weak moments of their lives stumbled and fell away doing beastly deeds. Eve, King David, Judas and many others have all revealed their dark side in moments of weakness. Jeremiah is saying that to even think that we don't have any evil within us is to be in denial. It is only by the power of the Holy Spirit we are able to overcome evil with good. The Spirit of God searches the inner most parts of our hearts and reveals and cleanses us from all that is evil.

Jeremiah 17:9-10
The heart is deceitful above all things, and desperately wicked: who can know it? I the LORD search the heart, I try the reins, even to give every man according to his ways, and according to the fruit of his doings.