"You can't sing about love unless you know about it"

The quote by Billy Eckstine recommends that in order to truly sing about love, one need to have experienced it or have a deep understanding of it. Singing about something with passion and authenticity needs a level of individual connection and psychological investment. Without this, the performance might stumble upon as insincere or doing not have in depth. Additionally, knowing about love extends beyond just one's own experiences, but also includes a wider understanding of the principle as a whole. Therefore, this quote highlights the importance of psychological intelligence and compassion as needed elements for developing significant and impactful art.