“Merlin nodded gravely. “Doing what is right is nearly always simple, Mr. Potter. But it is never easy.”
“I know what we do is right but right doesn't always mean easy.”
“Yes, it is easy to see that nearly six years of magical education have not been wasted on you, Potter. Ghosts are transparent.”
“It may not always be easy, convenient or politically correct to stand for truth and right, but it is the right thing to do. Always. ”
“These things are never easy, and you take them to your grave.”
“Oh, very good,' interrupted Snape, his lip curling. 'Yes, it is easy to see that nearly six years of magical education have not been wasted on you, Potter. 'Ghosts are transparent.”