keep to the straight and narrow

keep to the straight and narrow

Fig. to behave properly and correctly; to stay out of trouble. If you keep to the straight and narrow, you can't help but win in the end. I always keep to the straight and narrow.
See also: and, keep, narrow, straight
References in periodicals archive ?
As Affleck's character tries to keep to the straight and narrow, he is constantly fighting his natural impulses.