Answer:
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Not a burden for its weight and daily carried out, He who takes it wishes it had never come about
Walk on the living, they don’t even mumble. Walk on the dead, they mutter and grumble
You heart it speak, for it has a hard tongue. But it cannot breathe, for it has not a lung.
You can always find me in the past. I am created in the present, but the future can not change me. What am I?