Because Jesus died for everyone and there is nothing we can do other than coming to Him by faith to be saved.
It doesn't matter how ugly we are in our sins, He can make anyone whole.
Satan will try to heave guilt on us to create doubt and destroy our faith.
We have to embrace this truth in order for God to take us through the cleansing process by faith. The Holy Spirit convicts us
of our actions and the Word of God helps us to renew our minds.