good tidings of hope are carried through numerous texts from the Quran and Sunna:
Warning against Despair
"(Muhammad), tell my servants who have committed injustice to themselves, 'Do not despair of the mercy of Allah. Allah certainly forgives all sins. He is All-forgiving and All-merciful.' (39:53)"
"And do not despair of receiving comfort from Allah; only the unbelievers despair of receiving comfort from Him. (12:87)"
The Prophet (s) said: "On the Day of Resurrection, Allah will gather the despondent of His mercy with their faces blackened. They will be given the name of 'the despondent of Allah's mercy.'" 231
Amir ul-Mu'minin (a) said to the man who was prevailed by despair of God's mercy out of his many sins: "You, to despair of the mercy of Allah is the greatest sin that you have ever committed." 232
Vastness of God's Mercy and Pardon
"Your Lord's mercy is completely overwhelming. (6:147)"
"Your Lord, certainly, has forgiveness for the injustice of the people. (13:6)"
"Allah does not forgive the sin of considering others equal to Him, but He may choose to forgive other sins. (4:48)"
"When the faithful come to you, say to them, "Peace be upon you. Your Lord has decreed for Himself to be All-merciful. Anyone of you who commits a sin out of ignorance, then repents, and reforms himself will find that Allah is All-forgiving and All-merciful." (6:54)" Imam as-Sadiq (a) said: "On the Day of Resurrection, Allah will extend His mercy so vastly that even Eblis will expect himself to be included with that mercy." 233