Shaykh al-Islam Mawlana Husayn Ahmad Madani (may Allah shower His mercy upon him) advised, 

‘‘Spend every moment of your life in the remembrance of Allah and in the service of din. Be mindful of death and that which is to come after it.’’ 

Malfuzat Hadrat Madani, p.84 (Delhi: Dar al-Isha‘at, July 1998 ed.)  by Mawlana Abu ‘l-Hasan Barah Bankwi