People are here on Earth to learn lessons and, in general, have chosen to accept experiences that are harder than they can handle - hence the complaints. This usually manifests as a profound state of dis-ease with their life. This feeling of dis-ease, if deep and long standing, manifests as illness. Thoroughly joyful, ecstatic people are usually in great health. When we are babies, most of us are bathed in love.
Babies are totally focused on getting and giving love every moment of every day.
Often, they get touched, hugged, and kissed more as babies than they will for the rest of their lives. In return, babies are absolutely not afraid to give love or to get it. As we grow older, we are taught to fear getting or giving love. Love becomes associated with pain and we narrow the circle of those we allow to come close enough to us to exchange love. Yet love is as important to our health as the air we breathe or the food we eat.