French author Marcel Proust is perhaps best known for his semi-autobiographical novel, “In Search of Lost Time” (aka "Remembrance of Things Past"), whose narrator falls in and out of love with several characters over seven volumes. This quote springs from the fifth volume: The narrator suspects his lover Albertine of loving other women, observing the tender way she looks at women in public. Proust reminds us that love is both indefinable and deeply sensory. While we can’t always put words to it, we know it when we feel it.