Answer:
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
There is one word that stands the test of time and holds fast to the center of everything. Though everyone will try at least once in their life to move around this word, but in fact, unknowingly, they use it every moment of the day. Young or old, awake or in sleep, human or animal, this word stands fast. It belongs to everyone, to all living things, but no one can master it. The word is?
Although my cow is dead, I still beat herΒ What a racket she makes.
I am mother and father, but never birth or nurse. I'm rarely still, but I never wander.
Iβm grown from darkness but shine with a pale light. Very round I am and always a lady's delight.