The soul is the principle of life, and it's also something much closer to our own awareness and consciousness of our existence because fundamentally for Plotinus what we are is souls, we're not intellects.

The forms are part of the mind, or really are the mind, they're just the contents of this universal night.

Just the way you might look at a painting and see the painting, and the painting is outside you, so this immaterial intellect would see the forms and behold them, as if they were standing before it. And Plotinus said that that can't be right because it falls prey to sceptical objections.

Al-Ghazali is the most important philosophical theologian of classical Islam, and Moderation in Belief is among his most important works. It sets out al-Ghazali's Ash?arite theology with unusual clarity and provides important background for such well-known works as his autobiographical Deliverance from Error and his attack on Avicenna in The Incoherence of the Philosophers. This first English-language translation, with notes that bring out the argumentation and background of the work, is thus very much to be welcomed.

Assuming there is an intellect, we're clearly not this universal intellect or we would know it. So that's one function of soul.

People often talk about Plotinus' system. The reason they do this is that Plotinus postulated a kind of series or chain of principles, so at the top there's what he called the One. Below the One is what he called Intellect. Below Intellect is Soul, and the effect of the soul is the physical world that we actually live in.

Once you're in a kind of revealed religious tradition, you wind up having to explain how the things said about God in the Bible or the Qur'an or whatever religious text you're dealing with, why these statements are true.