From
A Calendar of Wisdom:
When you have doubts about what to do, just imagine that you might die at the end of that same day, and then all your doubts will disappear, and you will see clearly what your conscience tells you, and what is your true personal wish.
A man condemned to immediate execution will not think about the growth of his estate, or about achieving glory, or about the victory of one group over another, or about the discovery of a new planet. But one minute before his death a man may wish to console an abused person, or help an old person to stand up, or to put a bandage on someone's injury, or to repair a toy for a child.