He said that this world isn't the real world and that the "real world" is called the World of the Forms, where everything has a perfect "template". So, in this world of the forms, there will be a perfect human, a perfect brick, a perfect bus and so on. The world we think is real (i.e. the one we're on now) is just a mere shadow of the perfection he suggested.
Fair to say I don't like him
