The line about “lekovod the boich” is a kotzker line. The kotzker rebbe heard a chossid say “lekovod shabbos,” before eating, and rhe rebbe said “likevod mayb boich” and ate, to teach a lesson about not fooling one’s self into thinking that they are on madregos that they aren’t holding by.
Other gedolim held “fake it till you make it” to a degree.