You can't commit sin and obey God at the same time!

The Certainty Theory: To know to do good and do it not is sin. A person's mind should be in one state, not two (double mindedness). To believe on Jesus Christ is righteous. To not believe on him is unrighteous. To not know is unrighteous. There is only one acceptable state: To believe on the one God sent.

To commit adultery is an act committed in an unrighteous state of mind. To continue in such a relationship means no change of state of mind. To repent of the sin and dissolve the unwarranted relationship changes the state of the mind of the person in regard to that particular issue. The person may find great relief of guilt, and peace with God.

All Sin Is Sin: Though there may be degrees of sin, all sin is unrighteous. Whether the sin is adultery, female promiscuity or something else (perhaps even promoting adultery), if it is not repented of, it continues as a part of a person's downward spiral and personality. If the sin is repented of, and God forgives the person through his confession for the sin, the person is clean regarding that particular issue. Not all men accept what God cleanses as clean; do not be perverted by such: revere them not. Neither be deceived by false ways avoiding repentance, which unGodly works of continuance of sin are manifest.

Future Predictions: Unless a person makes a change of mind and deed, there is no reason to expect change. Nevertheless, conviction of sin may make the sinful person living in an unacceptable state of mind to think differently. It also may cause shame and lead the person to repentance. King David of Israel changed his mind at the word of the prophet. His state of sin changed toward repentance and restoration with God. No one should want to live in such misery of sin; all he needs to do is believe and change his life to please God.

Links:

Scientific Influence And Faith

We Must Prevent God's Wrath

Know The Mentality Of Your Friends

Soul, Mind And Spirit