Al-Junaid said, “Our knowledge is restricted by the Qur’an and the Sunnah, and they are the two active principles. Consensus and analogy are only proven and their evidence is corrected by the Qur’an and the Sunnah, so they are two passive principles of ruling. So from these four facts emerged the emergence of the legitimate rulings, by acting upon which happiness is achieved, for existing things emerged from four divine realities, which are life, knowledge, and will. Power and bodies emerged from four facts: heat, cold, dryness, and humidity. The generators emerged from four elements: fire, air, water, and earth. The human and animal bodies emerged from four humors: yellow, black, blood, and phlegm. Heat and cold are active, and moisture and dryness are passive. So know.