What Am I Riddles

Question: I shoot people and sometimes cut off their heads. What am I?

Question: We have what we did not find; what we did find we left behind.

[What do we have?]

Question: I am the universe's complex elegance, I am everywhere...I am created through suffering, inspiration, joy, and even despair. I am born as an idea, and then presented to the human eye. However, unlike living things, I can never die. What am I?

Question: I support the fallen (ones) I restrain the naughty (ones) I replace the nonexistent (ones) What am I?

Question: What lightens the light and darkens the dark?