In the movie Alice Through the Looking Glass in mental institution scene (around 1:10:10) there are two quotes at the back wall. These two quotes fit greatly to the scene and bridge the underline topics of Alice´s sanity and personal aspirations in the movie - obedience to traditions of times and interpretation of Alice´s actions. But I wonder, are those somehow related to Lewis Carroll works - either with "Through the Looking Glass" book or other literary works-writings?
The ship that will not obey the helm will have to obey the rocks
Sometimes you need to be cruel to be kind
I do not know the source of first quote, all I found, that it is an old English proverb. The second quote, as quite famous, can be dated back to Shakespeare "Hamlet" (Act 3, scene 4, lines 173-176). "I must be cruel only to be kind". What I am looking is Lewis Carroll´s reference, own interpretation or usage of them in his writings. Or it simply was directors choice to add those quotes to help with interpretation of movie sub-themes.