( saying ) used to say that you could easily have been in the same difficult or unpleasant situation that sb else is in
THERE BUT FOR THE GRACE OF GOD (GO I)
Meaning of THERE BUT FOR THE GRACE OF GOD (GO I) in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005