Right this moment, there are a multitude of people all around the planet involved in serving you. Many of them you will never meet in person, but you will benefit greatly from their activities. There are farmers who are planting and harvesting for you. There are people in the clothing industry who are weaving the cloth and designing clothing you will eventually wear. There are trucks, boats, and planes that are shipping the food you will eat, the clothes you will wear, and many other items that you will buy or use. There are people who are involved in making certain that you have water, electricity, phone service, and books. The postal authorities are busy at work delivering the letters you sent and bringing you mail that others have sent you. There are inventors who are working day and night on items that will one day be yours. There are engineers, mechanics, and a wide variety of laborers all around the globe who toil for your benefit. There are medical researchers working to find cures for illness that might one day save your life. Whenever you see a large crowd of people, it is a reminder to be grateful to all of those who are involved in one way or another in enhancing the quality of your life.
(From Rabbi Pliskin's "Happiness",p.37-8)