Actions speak louder than words. Although thinking and feeling undergo change, the substantial transformation is the will.
Repentance leads to service.
The affections and emotional desires change in repentance. At regeneration a person receives the ability to turn from sin and do God's will, BUT he must choose to stop lying, stealing, living immorally or whatever other sins he has been committing. A command of God presumes the ability to do so. God would not command man to do what he cannot. One may refuse to obey this command but cannot escape the consequence of that decision.