I've seen the needle and the damage done = I take this literally, every high, brings some damage to the body, the mind, the spirit. A part of them wants to die, not just get high.
a little part of it in everyone = All of us have something they don't like about ourselves, or have some type of trauma that we wish we could forget.
but every junkie's like a setting sun" = burning, and fading fast.
They're gonna go down.