Answer:
What is the beginning of eternity the end of time and space the beginning of every end and the end of every race?
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
The higher I climb, the hotter I engage. I cannot escape my crystal cage. What am I?
What goes up but never comes down?
Sing me to a baby about to go to sleep.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.