Answer:
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
We are few to the wise; We are abundant to the drunken; We can calm the beast and are precious to the child; We can devour the heart, without piercing the skin
One by one we fall from heaven down into the depths of past, And our world is ever upturned so that yet some time we’ll last.
Lovely and round, I shine with pale light, grown in the darkness, a lady's delight.
My first is in blood and also in battle. My second is in acorn, oak, and apple. My third and fourth are both the same. In the center of sorrow and twice in refrain. My fifth starts eternity ending here. My last is the first of last, Oh Dear.
People take me on walks and I run and have fun. What am I?