Grillo became renowned for his ability to merge Western modernist aesthetics with Yoruba cultural philosophy, spirituality, and symbolism. His distinctive artistic language, characterized by cubistic figuration, stylized forms, and luminous blue tonalities, positioned him as one of the defining visual voices of twentieth-century Nigerian art. Deeply committed to the philosophy of cultural synthesis, Grillo’s works consistently explored themes of identity, ritual, spirituality, and social experience. Abe Nu Gongo (The Curved Beak of the Parrot) reflects this engagement through its symbolic meditation on speech, mediation, and spiritual authority within Yoruba cosmology, revealing the artist’s enduring interest in transforming indigenous philosophical ideas into modern visual expression.