We are choices, not abilities
Harry often struggles with his dark side. More curiously, there are moments where he is afraid that he could be far more evil or suited for dark arts than he knows. He is haunted by his magical abilities, unique talents (such as the ability to talk to snakes), and to some extent, his genes (Voldemort is magically a part of Harry’s physical composition). I’m sure we share this fear at times — this fear that we are not who we think we are.
Dumbledore addresses these concerns:
It is our choices, Harry, that show what we truly are, far more than our abilities.