Human beings are special. They have a special gift from nature, which is the ability to think. Eating, sleeping, mating and defending are even done by animals.
An elephant can eat much more than any man on earth. A polar bear sleeps for six months continuously. A pigeon can have sex sixteen times in a day. A tiger is a very skilled fighter and can defend its territory much better than man.
Human beings must have a higher purpose in life. Each person is unique. Each person has unique gifts to help him fulfill his unique purpose. Find your purpose, devote yourself to it and your life will be pleasant and rewarding.