What is the origin of the phrase To forget is vain endeavor love's remembrance lasts forever?

The phrase "To forget is vain endeavor; love's remembrance lasts forever" originates from the poem "The Garden of Love" by William Blake. In this work, Blake explores themes of love, loss, and the enduring nature of emotional memories. The line reflects the idea that while one might attempt to forget a past love, the feelings and memories associated with that love persist indefinitely. Ultimately, it highlights the futility of trying to erase deep emotional bonds.