It is reported form Abū Al-Dardā – Allāh be pleased with him – that he said, “Three make me laugh, and three make me cry.

Those that make me laugh are a person who puts his hopes in this worldly life while death pursues him, a person who is heedless [of his Lord] while [his Lord] is not heedless of him, and a person who always laughs while he does not know whether he has pleased Allāh or angered Him.

What makes me cry is being separated from my beloved: Muhammad and his party (the Companions), the horrors of the time of death, and standing in front of Allāh ‘azza wa jall on the Day when the secrets will be revealed and I do not know will I then go to Paradise or Hell?”

Ibn Al-Mubārak, Al-Zuhd wa Al-Raqā`iq article 250.