this would be similar to the star fish story : there were thousands of star fish scattered on the sea shore a man began picking them and throwing them back to the sea, another came and ask him can you possibly get all this star fish back into the water?....
The man pick yet another and threw it into the sea and answered the man, i just made a difference with that one...ofcourse it would be grateful i'd threw him into the water....
Moral lesson: we can't do good to everyone in this world but within your range with whatever you have, extending the smallest unit of help in whatever form would go along way to spread the love, cause such will go on to do to another, so the chain will likly continue...
That's a great analogy. There's at least a difference - something we can do regardless how little it may seem. We can try.