The difference between rational and irrational soul is based on reason and function,Rational soul – Found in humans, it allows thinking, reasoning, and making moral decisions. It is responsible for intellect, logic, and self-awareness, enabling humans to plan, reflect, and understand abstract ideas.Irrational soul – Found in plants and animals, it does not involve reasoning. In plants, it controls growth and nutrition. In animals, it governs movement, instincts, and basic desires like hunger and reproduction.In short, the rational soul can think and reason, while the irrational soul is limited to basic functions and instincts.