First Law Of Thermodynamics

The first law of thermodynamics stated that energy can be transformed, but cannot be created or destroyed.
Alternatively, the increase in the internal energy of a system is equal to the amount of energy added by heating the system minus the amount lost as a result of the work done by the system on its surroundings.
(http://en.wikipedia.org/wiki/First_law_of_thermodynamics)

Let’s do some mathematics.

Increase energy of a system = Energy added (heating) – Energy lost to surrounding

Here are several forms of energy that exist in our daily life.
Working/Studying performance
Entertainment (Whatever healthy activities that bring happiness)
Stress (The force that poses danger to human if not managed carefully)

Substitute these 3 into the equation.

Working/Studying performance = Entertainment – Stress

Explanation
In order to pursue excellent working/studying performance, we have to make sure that we are in good condition and free from any hazardous elements. Stress could be a driving force for us to move on. Meanwhile, it jeopardises our health if the negative sides of it are not “transformed” (because energy cannot be destroyed). Never underestimate the power of stress, it can be “the straw that broke the camel’s back”. If that is the case, stress could break human’s back. Entertainment comes into play now, an important step in attempting to “transform” stress. Any healthy activities that bring the rapid increase of happy hormones are welcomed. Engaging ourselves in entertainment decreases the stress level to a safety point (this point is varied in each individual).

The above equation makes sense right?

To conclude, a balance must be struck between work/study and play, to offer a good quality of life. Bear in mind that the action of “transforming”stress should not be delayed.

Enjoy your life :-)