Meaning of "Somebody Knocking" by Robert Plant

The lyrics of "Somebody Knocking" by Robert Plant can be interpreted as a metaphor for the external forces and influences that affect our lives. The references to natural elements like the rising star, crowing rooster, and crawling snake symbolize the unstoppable cycles of nature that we are all a part of. These forces are beyond our control, just like the mysterious knocking on the door at midnight, which can represent unexpected events or challenges that disrupt our lives. The repetition of "Casting your spell, talking all out of your head" could signify the negative thoughts and doubts that can be planted in our minds by external influences, causing confusion and uncertainty. Overall, the song could be a reflection on the need to be aware of these external influences and to overcome them in order to maintain clarity and focus in our lives.