The quote by Anne Lamott suggests that the artist's work is deeply rooted in a fundamental urge or drive. This implies that the creation of art is not merely a superficial act, but rather a profound expression of the artist's life experiences and intrinsic motivations. The imagery of 'dipping into the river' indicates that the artist draws inspiration from a rich source of creativity and vitality that sustains them.

Furthermore, the phrase "making dream material visible" emphasizes the transformative power of art. It highlights the role of the artist in bringing intangible ideas and emotions into a tangible form, allowing others to witness and experience these dreams. In essence, Lamott captures the essence of artistic expression as a vital interplay between personal necessity and the broader human experience.