Explain that to me in a hidden manner, as if no one, neither man nor woman, knows of it. O clever painter, I implore you.

This couplet is a heartfelt plea to a "clever artist" or a wise guide. The speaker requests something to be explained to them in a completely private and discreet manner. The phrase "so that no man or woman knows" emphasizes the absolute need for secrecy and confidentiality. It suggests the matter is very personal, sensitive, or requires extreme tact. The "artist" here isn't just someone who paints; it's a metaphor for someone skilled in subtle communication, someone who can convey deep meaning without revealing it openly, or simply someone trusted to keep a profound secret. It highlights the value of discretion and intimate understanding.