Imam ‘Ali (a.s.) said:
إنَّهُ لَيْسَ لاِنْفُسِكُمْ ثَمَنٌ إلاّ الْجَنَّةُ فَلا تَبِيْعُوها إِلاَّ بِها.
(Be aware) no price is good enough for you except everlasting prosperity and paradise, so do not exchange it for any other price.1
Usually when somebody is asked about the price of his life, he cannot name a price . No price is high enough.
However, in reality, he exchanges this precious life gradually, day by day , for a very small price indeed. And, lo and behold, he wakes up one fine day towards the end of his life, to find that he has sold off this priceless asset in exchange for a house or a car or a country villa, which he will soon leave behind in any case … when death comes knocking at the door !
Imam ‘Ali (a.s.) says that nothing whatsoever of the material treasures of this world is worthy enough to be exchanged with the capital of your life. The only thing worth selling your life for is God’s satisfaction, human and spiritual development that leads to an everlasting prosperity in paradise. This is the thing to buy with your life ; it is worthy of every endeavor, attempt and sacrifice one can make.