Anyone know what “and i never even caught that knife in the basement” means? Ive left some context below.?

To give u some context a girl i know showed me a conversation she had with a guy we both worked with who has sadly since passed away, but he liked her and one night had sent her a poetic confession on missing out on his opportunity to pursue her, regretting that he hadent tried harder, that if i can remember correctly he said ‘like a goddess in may i let u slip away, and i never even caught that knife in the basement.’ I couldnt stop focusing on that line, tried googling it, no song lyrics was it apart of, no poets or famous historians that quoted it, no friends or family ive asked that could give an explanation to what it meant, just results on a term used in stocks thats right stocks like wallstreet to a term of a falling knife. No basement included, he was a very intellectually smart introverted person but im afraid i missed my chance kinda like he did but more in the way to ask him what he meant by it. Id love to hear what u all think that come across this. Thank you for anyone who tries to answer this!! Its one that’ll really make u think.