Step-by-step explanation:
There are multiple readings of this allegory. The text demonstrates that the Idea of the Good (Plato capitalises these concepts in order to elevate their significance and refer to the idea in itself rather than any one particular instantiation of that concept), which we are all seeking, is only grasped with much effort.
Our initial experience is only of the good as reflected in an earthly, embodied manner. It is only by reflecting on these instantiations of what we see to be good, that we can start to consider what may be good in itself. The closest we can come to truly understanding such Forms (the name he gives these concepts), is through our intellect.
Human beings are aiming at the Good, which Medieval philosophers and theologians equated with God, but working out what the good life consists of is not easy! Plato claims each Soul (or mind) chooses what is good, saying: