Piet Mondrian’s philosophy of art shares a significant similarity with the beliefs of ancient Greeks in that both held a profound appreciation for an underlying order in the universe. Specifically, Mondrian's belief in an underlying spiritual order reflected the Greek pursuit of understanding the laws of mathematics and nature. Both sought to reveal the fundamental truths and harmonies of existence through their respective artistic and philosophical practices.
While the other statements regarding vigorous exercise and the golden ratio may have some relevance to their broader cultures, they do not capture the core philosophical alignment as accurately as the notion of seeking a deeper order and understanding in the universe.