What Am I Riddles

Question: People pick me, and watch me until they give me power. Then they don't stare in my eyes. What am I?

Question: Living I do not exist. Dead I am an inspiration. You always doubt me. But never reject me. I am what is given from old to young. Without me people would not learn mistakes. What am I?

Question: If you have me, you want to share me. If you share me, you haven't got me. What am I?

Question: You will see me every night sometimes i am scary and sometimes not What am I

Question: Given to all man then taken away, you can beg for more time but I never stay What am I?