These four lines read like a heartfelt blessing or a whispered hope. The speaker addresses Harriet, and you can tell right away that he holds her in the highest regard. He isn’t just asking for fleeting happiness; he wants her soul to keep burning with something lasting — a blend of love and moral goodness ("Love and Virtue's glow"). The image is of a flame that doesn’t go out, a warmth that stays steady. The second couplet reveals that this isn’t one-sided: her pure thoughts “force” an equally passionate response from him. There’s a lovely sense of mutual inspiration — her inner goodness naturally draws out his own affection. The mood is intimate and devotional, almost prayer-like, but without any heavy religious weight. It feels like a quiet moment of admiration, suspended in time, where the only thing that matters is the enduring connection between two souls.
To Harriet — Summary
Ever as now with Love and Virtue's glow May thy unwithering soul not cease to burn, Still may thine heart with those pure thoughts o'erflow Which force from mine such quick and warm return.