What does art is a jealous mistress mean?

The phrase "art is a jealous mistress" suggests that pursuing art requires intense dedication and commitment, often demanding sacrifices in other areas of life, such as relationships or personal time. This metaphor implies that art can be both alluring and consuming, drawing artists into an exclusive relationship where their focus is primarily on their craft. It reflects the idea that true artistic endeavor cannot be easily balanced with other pursuits, as it often requires undivided attention and emotional investment.