Eye of the Tiger is one of those songs that everyone has heard and everyone knows what it's all about. It's a song about fighting, metaphorically or literally. Sometimes both. A literal fight might involve - purely hypothetically - boxing. An example of a more metaphorical fight would be the fight to get your new album, Darklight, the recognition it deserves. Another example is Mike Lindell's fight against basically the entire establishment. We'd rather step into the ring with no training.
