Answer:
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see. What am I?
I am shared by goats devils and unicorns.
Oh lord! I am not worthy! I bend my limbs to the ground. I cry yet without a sound. Let me drink of waters deep. And in silence I will weep.
I am a mother from a family of eight. Spins around all day despite my weight. Had a ninth sibling before founding out it's fake.
I am alive without breath and cold as death. I am never thirsty but always drinking.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.