The significance of the works of Vincent van Gogh in modern art lies in their emotional depth and innovative techniques. His use of bold colors, expressive brushwork, and unique perspectives pioneered the Post-Impressionism movement and influenced future generations of artists. Paintings like "Starry Night" and "Sunflowers" exemplify his passion for capturing the essence of his subjects, transcending mere representation. Van Gogh's work challenged conventional artistic norms, promoting the idea that art could convey complex emotions and inner experiences, fundamentally altering the landscape of modern art.