The "need to know all of them" part of the proverb is played by Andy Garcia, known as "Fingers" who ties all four appendages of the proverb together.
While the film wasn't a box office success, it certainly earns respect for its originality. From the perspective of explaining the many facets of a proverb, and bring it to life, it is well worth seeing. Most writers who integrate a proverb into a book or movie, do so to illustrate a specific point. In this case, the movie serves to illustrate the proverb.