What was the real forbidden fruit?

I've often wondered, what was the true forbidden fruit referenced in the biblical narrative? Was it literally an apple, as commonly depicted, or was it something more symbolic, perhaps representing the knowledge of good and evil? Did it serve as a metaphor for the consequences of human curiosity and the pursuit of knowledge beyond our means? Or was it simply a device used to convey a deeper moral lesson about the dangers of disobedience and the importance of following divine law? The question of the real forbidden fruit has intrigued philosophers, theologians, and scholars for centuries, and I'm eager to explore the various interpretations and theories surrounding this enigmatic concept.