Hawzah News Agency – Imam Sadiq peace be upon him says:

ذِكرُ المَوتِ يُميتُ الشَّهَواتِ في النَّفسِ، ويَقلَعُ مَنابِتَ الغَفلَةِ، ويُقَوّي القلبَ بمَواعِدِ اللَّهِ، ويُرِقُّ الطَّبعَ، ويَكسِرُ أعلامَ الهَوى‏ ويُطفِئُ نارَ الحِرصِ، ويُحَقِّرُ الدُّنيا.

'The remembrance of death kills the desires in the self and uproots the sources of inattentiveness. It strengthens the heart about Allah's promises, softens one's attitude, breaks the pillars of inclinations, extinguishes the fire of greed, and it degrades the world.'

Source: Bihar al-Anwar, v. 6, p. 133, no. 32