Ali ibn Abi Talib (may Allah be pleased with him) said,
Having unfading hope makes one forget the Hereafter, while following one’s desires deviates from the truth. This world is retreating and the Hereafter is coming, so be among the sons of the Hereafter, but do not be among the followers of this world; because today there is action without reckoning, whereas tomorrow, there is reckoning without (any more) action.
(Read on pg 55, Ibn Qayyim al-Jawziyya, Spiritual Disease and It’s Cure. Al-Firdous Ltd. London:2006.)