I love these kind of intros, anyway but, on this one, the low, pulsating bass snarl reminded me of 22 Acacia Avenue. Of course, sooner than I thought, the guitars came with this eerie vibe that sets the mood. I like how the intro has Adrian doing the main melody with arpeggios and Dave's on the back doing another one; later, Janick comes in with those third chords adding an electric layer to the crescendo and it bursts into a powerful rage with the guitars doing another intervals of the key notes. Bruce sounds aggressive (not this annoying 'strained' bullshit!) and when it gets to the pre chorus, the twists and turns of the vocal phrasing reminds me a lot really of Michael Kiske (there are more vocal parts on TBOS which are like Kiske would do).
Jan's solo is killer! The other instrumental part is wonderful and after the H and Davey solo section, there could've been another instrumental part attached to it. A pretty powerful song with lyrics that are contemplative but, punches the face, too. The 'unknown' in the title points towars ignorance, I understood. Bruce said Steve didn't allow him to change a few things on the way the vocals should be sang and that he found a new vibe to sing Steve's lyrics on this record and I did get that before reading this particular interview.
I give it 8,5/10.