Answer:
A precious fluid, thicker than water.
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
We are five little objects of an everyday sort. You will find us all in a tennis court.
As I walked along the path I saw something with four fingers and one thumb, but it was not flesh, fish, bone or fowl.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.