"Hell exists as a final possibility, but several of the Fathers have none the less believed that in the end all will be reconciled to God. It is heretical to say that all must be saved, for this is to deny free will; but it is legitimate to hope that all may be saved. Until the Last Day comes, we must not despair of anyone’s salvation, but must long and pray for the reconciliation of all without exception. No one must be excluded from our loving intercession. ‘What is a merciful heart?’ asked Isaac the Syrian. ‘It is a heart that burns with love for the whole of creation, for men, for the birds, for the beasts, for the demons, for all creatures.’ Gregory of Nyssa said that Christians may legitimately hope even for the redemption of the Devil."