Answer:
As a whole, I am both safe and secure. Behead me, I become a place of meeting. Behead me again, I am the partner of ready. Restore me, I become the domain of beasts.
What can be measured but not seen?
Where humans breath liquid?
How far will a blind dog walk into a forest?
What can bring back the dead. Make us cry, make us laugh, make us young. Born in an instant yet lasts a life time?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.