The answer is simple: Laozi, Zeno of Elea, Zhuangzi, Heraclitus, Bhartrhari, Eckhart, Hegel, Kierkegaard, Nietzsche, G. K. Chesterton, Kierkegaard, and many others.
I choose to show you Zeno, because I like him, as can be seen in a fresco from the Library of El Escorial, Madrid, "Zeno Shows the Youth the Doors to Truth and Falsity"