keep to, stay on, etc. the straight and narrow

keep on the straight and narrow

To maintain a morally upright way of life; to only make choices that are considered morally and legally correct. Now that I have a conviction on my record, I really have to keep on the straight and narrow going forward. My father kept on the straight and narrow until the day he died, and I think he regretted never doing anything wild or unexpected when he had the chance.
See also: and, keep, narrow, on, straight

stay on the straight and narrow

To maintain a morally upright way of life; to only make choices that are considered morally and legally correct. Now that I have a conviction on my record, I really have to stay on the straight and narrow going forward. My father stayed on the straight and narrow until the day he died, and I think he regretted never doing anything wild or unexpected when he had the chance.
See also: and, narrow, on, stay, straight
Farlex Dictionary of Idioms.

keep to, stay on, etc. the ˌstraight and ˈnarrow

(informal) live your life according to strict moral principles: She’s stopped drinking and now she’s trying to stay on the straight and narrow.This phrase comes from the Bible, describing the path to Heaven.
See also: and, keep, narrow, stay, straight
Farlex Partner Idioms Dictionary
See also:
  • keep on the straight and narrow
  • keep to the straight and narrow
  • be on the straight and narrow
  • stay on the straight and narrow
  • stay to the straight and narrow
  • on the straight and narrow
  • opportunity makes a thief
  • feel duty bound to (do something)
  • feel honor-bound to (do something)
  • be honor-bound to (do something)