The phrase has deep roots in Western culture, tracing back to the Latin adage . It appears in various forms across many languages, such as the Italian L’amore è cieco or the English Love is blind . LOVE IS BLIND - Definition & Meaning - Reverso Dictionary

At its core, this saying describes how of their partner's flaws. When someone is "blinded by love," they often:

: Overlooking habits or character flaws that would otherwise be deal-breakers.