"Jesus answered, “Very truly I tell you, you are looking for me, not because you saw the signs I performed but because you ate the loaves and had your fill. Do not work for food that spoils, but for food that endures to eternal life, which the Son of Man will give you. For on him God the Father has placed his seal of approval.” -- John 6:26-27
Over the years there has been opposition to McDonald's Happy Meal toys. Some people believe that children only ask for happy meals to get the toy; they don't really care about the food in the box. Just imagine someone being more concerned with a toy that breaks in no time rather than a nourishing meal. Don't work for the stuff that spoils.
Speaking of food, there were numerous people who would follow Jesus anywhere, as long as he fed them. They were all about the momentary pleasure of a full stomach. But Jesus wanted more; he asked that people follow him for eternal reasons that would nourish the soul. He didn't want anyone working for the stuff that spoils.
Why do you follow the Lord my friend? Do you want some blessing in your job or special provision for your future? Are you satisfied with the immediate, and not really interested in the eternal? Jesus counsels every person who shortchanges themselves by seeking the toys of this world. He has so much more to offer... so don't work for the stuff that spoils.