The laws of Physics state that if a stone is thrown upwards towards the sky, it falls back down with a greater
If that stone is an action, and the sky the subject; the action will boomerang back to one with a greater force. The puzzle however, lies in separating the action from its return. Once the connection between the two is made, it is fairly simple to fathom the sensible course of action. The simplicity of the execution of said action is blatant, but the presence of mind and will to do so are coveted.
It is fairly simple to fathom that if one performs a generous action, generosity will follow with greater force. However, the source of the latter may be entirely unconnected with the initial source. Once this connection has been made, several similar connections tend to reveal themselves. It is now common knowledge that the one good deed will reap others, which bear more fruit.
But armed with this knowledge, is it always the generous course of action one follows? The path of self-absorption is as tempting as candy to a child. The very feelings associated with temptation imply that the victim of the same knows better than to succumb to its grasp. Resistance to temptation; the temptation to stray from the path of giving, is the only solution to prevent a negative boomerang.
By maintaining the will to spread joy, one inadvertently maintains the will to spread joy in oneself. That is one aspect of the joy of giving. The second aspect is more common.
Do you not smile when you see the absolute joy on a child’s face when your meal becomes his first meal in two days?