Shakespearean English isn’t really my area, but when I spotted this sign, it didn’t seem right to me.
To thy own self be true? The quote, from Shakespeare’s Hamlet, is “This above all: To thine own self be true.” Because own starts with a vowel, thine is used before it instead of thy. According to Merriam-Webster, “THINE: thy—used especially before a word beginning with a vowel or h.”
(However, as I say, Shakespearean English isn’t really my forte, so if someone out there can offer more, please feel free to chime in.)
In poking around the InterWebs for more information, I came across the tale of a young woman who has “To Thy Own Self Be True” tattooed across her waist. But she’s also buck nekkid. So you’ll just have to take my word for it. It’s unfortunate.