Answer:
who do you think you know but sometimes you don't
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
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
Who is that with a neck and no head, two arms and no hands? What is it?
What is long and slim, works in light. Has but one eye, and an awful bite?
People take me on walks and I run and have fun. What am I?