Whether there can be despair without unbelief?

Objections

Objection 1 : It would seem that there can be no despair without unbelief. For the certainty of hope is derived from faith; and so long as the cause remains the effect is not done away. Therefore a man cannot lose the certainty of hope, by despairing, unless his faith be removed.
Objection 2 : Further, to prefer one's own guilt to God's mercy and goodness, is to deny the infinity of God's goodness and mercy, and so savors of unbelief. But whoever despairs, prefers his own guilt to the Divine mercy and goodness, according to Gn. 4:13: "My iniquity is greater than that I may deserve pardon." Therefore whoever despairs, is an unbeliever.
Objection 3 : Further, whoever falls into a condemned heresy, is an unbeliever. But he that despairs seems to fall into a condemned heresy, viz. that of the Novatians, who say that there is no pardon for sins after Baptism. Therefore it seems that whoever despairs, is an unbeliever.