Should we fail to prepare for the uncertainty of the time of death, we will not accomplish the great purpose, that which we will surely need when we die.

Longchenpa
A Mirror Revealing the Crucial Points: Advice on the Ultimate Meaning
translated by Adam Pearcey
source: http://www.lotsawahouse.org/tibetan-masters/longchen-rabjam/ultimate-meaning
Read a random quote or see all quotes by Longchenpa.