Plato thinks that there is the goodness itself in the world of Forms.
The theory of Forms (or theory of Ideas) typically refers to the belief that the material world as it seems to us is not the real world, but only an “image” or “copy” of the real world.
Plato applies this concept to all of material things.
According to Plato, there may be a tree itself in somewhere.
Trees that we can see in our lives share the property of the Form of the tree itself.
|The reason why trees are trees is that they participate in the Form of the tree itself.
The reason why other things are not trees is that they don’t participate in the Form of the tree itself.