EXPECTATION AND DESPAIR H 444 "If a believer realized the full extent of the punishment of Allah, none will expect to desire His Paradise; and if an unbeliever realized the full extent of the Mercy of Allah, none would despair of His Paradise." R 444 Muslim with a chain up to Abu Hurairah who related that the Prophet, praise and peace be upon him, said this
443- وعن أَبي هريرة رضي الله عنه : أنَّ رسول الله صلى الله عليه وآله وسلم ، قَالَ : "لَوْ يَعْلَمُ الْمُؤمِنُ مَا عِنْدَ الله مِنَ العُقُوبَةِ ، مَا طَمِعَ بِجَنَّتِهِ أَحَدٌ ، وَلَوْ يَعْلَمُ الكَافِرُ مَا عِنْدَ الله مِنَ الرَّحْمَةِ ، مَا قَنَطَ مِنْ جَنَّتِهِ أحَدٌ" رواه مسلم .