Meaning of "Full Moon" by Santana

"Full Moon" can be interpreted as a metaphor for personal transformation and the struggle with one's darker nature. The imagery of the full moon triggering a change in the man suggests a deep inner conflict or turmoil that he cannot control. The chorus, with its repeated references to not locking the open door, implies a sense of inevitability and the inability to deny or suppress one's true self, as represented by the man's transformation into something other than human. The line "She sees the change in him but can't see what became out of her man" captures the sense of loss and confusion that often accompanies personal growth and change. Despite the ominous tone of the lyrics, there is also a hint of acceptance and resignation, as the man and his loved one grapple with the reality of his transformation and its impact on their relationship.