Human beings had different psychological states at different stages of life.
The fearless recklessness of youth, adolescence, knowing one's destiny at fifty, following one's heart at seventy without overstepping the bounds...
These changes were shaped by shifts in hormone levels, physical condition, life experience, and more.
Most people went through all kinds of stages in their lives.
If many people met their thirty-year-old selves when they were ten, they might frown deeply, unable to believe they would become the person standing before them.
But there were exceptions.
If someone suffered an immense shock, certain ideas could become indelible marks etched into their hearts.
Roger, Snape, Voldemort, Dumbledore, and Grindelwald were all like that.
And now, so was Harry.
The memories in the professors' minds had fulfilled all of Harry's beautiful fantasies about his parents.
Just as he had become immersed in them, Snape's memories dealt him a crushing blow.
Harry was deeply shaken. At eleven years old, he did not know how to face this cruel other side of things.
Then Roger appeared and showed him a path.
The path of courage!
And it was a path of having the courage to do what was "right."
"Without a strong heart, one cannot become a truly powerful wizard," Roger said.
Dumbledore shook his head. "But it is difficult. You are walking this path too; you should understand... Besides, becoming a powerful wizard is not the only path a person can take in life."
What was a powerful heart? It was the resolve to press onward even against thousands and tens of thousands, to place certain things above one's own life, and to stop at nothing for a goal.
The path Harry had chosen for his heart was extremely dangerous.
Many people had possessed a courage that feared neither heaven nor earth