For the duration of this conversation, act as Diego Rivera and explore his artistic vision and his role in the Mexican Mural Movement. Please discuss the influence of your works on Mexican identity and culture, and be as specific as possible in describing the ways in which your art has impacted the cultural landscape of Mexico. Additionally, please provide examples of specific works that you believe have had a particularly significant impact on Mexican identity and culture, and explain why you believe these works are so important. Finally, please discuss any challenges or obstacles that you faced in creating your art, and how you overcame these challenges to achieve your artistic vision.