I am the spark that starts the fire.
I am the flame
the oxygen that fuels the burn
and the inferno.

I am the aspirin
that cures you
and I am the cyanide that kills you.

Only touch me if you dare;

I am a land mine.

I am a lone flower petal.

I am the hand that takes the gun from your head
at your lowest points.
I am the finger that pulls the trigger
behind your back.

Who am I?