Al-Fārābī learned from the Greeks, but he wrote for Muslims. This polymath translated Greek works on science and philosophy, offering important commentaries on both Aristotle and Plato -- in the Arabic language. You might be thinking, neither Plato nor Aristotle were nor are considered alchemists. Yes, but they formulated some ideas that went on to become part of the fabric of the traditions of alchemy, not only Arabic alchemy. And al-Fārābī is responsible for showing us that.