Lyric discussion by poetogethr 

Cover art for King and Lionheart lyrics by Of Monsters And Men

This song is about the Lion-Heart and how he/she convinced the king to be brave and stand his ground during an invasion. Eventually, the King and the Lion-Heart are taken captive and transported across sea. As they leave, they are drawn through the crowd of their people and the Lion-Heart is at peace knowing that nothing will ever shake his/her confidence and that because of so, the King will always have someone by his side for strength.

Great imagery with the passing clouds in the sky

"And in the winter night sky ships are sailing, Looking down on these bright blue city lights."

My Interpretation

I agree with poetogethr that the song is about an invasion. I wondered if the ships sailing in the sky are invading planes or alien crafts of the invading army, and if the things lurking below the depths are submarines. Then again, the invasion could be taken completely symbolically of a "cancer". An intriquing poem and beautiful, intense song.