It is reported that Al-Ḥasan Al-Baṣrī often used to say, “O youth! Seek the hereafter, for we often see people pursuing the hereafter and finding it as well as the dunyā (worldly wellbeing), but we have never seen anyone pursue the dunyā and gain the hereafter as well as the dunyā.”
Al-Bayhaqī, Al-Zuhd Al-Kabīr, article 12.
Also read
It is reported that Al-Hasan Al-Basrī – Allāh have mercy on him – said: How strange it is that a people whose departure (from this world to the next) has been announced, and whose predecessors have already departed, still play around! Abū Bakr Al-Daynūrī, Al-Mujālasah wa Jawāhir Al-‘Ilm article 843.
The difference between you and the one in the grave.
This life is like a dream.