Lyric discussion by jermy 

Cover art for Angel lyrics by Massive Attack

I believe this song depicts the perilous effects of lust; how the persona is completely dangerously enraptured by a certain 'angel' with devious intentions. Eyes are normally indicative of a person's intentions, therefore, the line 'Her eyes, She's on the dark side' indicates her malciious intent. I suppose 'Neutralize, Every man in sight' really means how every man is easily taken into her seduction. Destructive lust is the main theme here; the music doesn't say otherwise.