When I was a child, my father told me why I should not waste food and finish what I have taken in my plate.
Here is the perspective he gave: “Son, have a look at the food in your plate. Think about the hard work of all the people that has made it possible. First, the farmer who ploughs the land, sows the seeds, then waits for the rain to arrive at right time. Then the crop has to be harvested, packed, transported and sold. We need to earn money to buy food and work for that money. Then, consider your mother’s hard work in preparing the meal for you. Son, it is the sum of all these hard works that makes food on your plate a possibility. So never waste food. Take as much as you want and finish it.”
We should also consider how lucky we are to get three meals a day in a world where millions are hungry and feel lucky to get even a single meal in a day.