The Shaw Pocket Bible Handbook, Walter A. Elwell, Editor, (Harold Shaw Publ., Wheaton , IL; 1984), p. 347
The decisive act in which a sinner turns away from sin in genuine repentance and accepts the salvation that Christ offers. The imagery in conversion is that of turning. A person is going along a road and realizes that he or she is on the wrong track. They will never reach the destination if they continue in that direction. So the person "turns," or "is converted." He or she ceases to go in the wrong direction and begins going in the right one. Conversion changes the direction of one's course of life from the wrong way to the right way, the way that God wants.