"Men shut their doors against a setting sun"

This quote by William Shakespeare is a metaphor for the end of something. The setting sun is a symbol of the end of the day, and the doors being shut represent completion of a period of time. It might be analyzed as an alerting to not let the chance pass by, as the sun will eventually set and the doors will be shut. It might also be interpreted as a tip to appreciate the present moment, as the sun will eventually set and the doors will be shut. The quote could also be translated as a tip to take advantage of the time we have, as the sun will ultimately set and the doors will be shut. Eventually, this quote is a pointer to make the most of the time we have, as it will ultimately come to an end.