Diotima’s vision of universal love in The Symposium is echoed not only in Castiglione’s The Courtier but in alchemy, in its symbolical sense; these, together with Christian ideas combined in Shakespeare’s imagination, strongly influenced the Sonnets. Where possible, Shakespeare inserted themes of the Sonnets in his plays. The result is a paradoxical combination of mysticism, sometimes erotic, in the Sonnets, with real situations and real lovers in both Sonnets and plays. The supreme realisation of the Dark Lady is Cleopatra, but the Lady also has mythic dimensions.