"They say a picture is worth a thousand words. But let me tell you, a story is worth a million pictures."
This is a wonderful observation. Stories play out in our heads, like our own private showing of a movie, not filled with the special effects of Hollywood, but of marvelous descriptive passages that allow us to create the scene and see the details of the story.
If you think you can, or if you think you can't, you're right.
Here is another insightful observation for your consideration. Have you ever heard of the theory of self-fulfilling prophecy? Does this quote not cut the reader to the quick ~ if you think you can you are inspired to try and continue trying until you accomplish what you set out to do. On the other hand, if you tell yourself you cannot accomplish the task at hand ~ if you lack the self-confidence to achieve your goal, you often tend to (unconsciously) hold yourself back assuring that you do, in fact, fail to accomplish the task at hand.
What lies behind us and what lies before us
Are small matters compared to what lies within us.
~Ralph Waldo Emerson
and a comparable

It is our choices, Harry, that show what we truly are, far more than our abilities.
Even in literature such as Harry Potter, we receive sage advice.
And, along the lines of fantasy comes one of my favorite quotations I have seen in a signature block, an excellent example of imagination and humor.
Meddle ye not in the affairs of dragons, for thou art crunchy and good with ketchup.
The final quotation I will leave you with is particularly applicable to those to whom the Muse whispers,
May your Muse always whisper in your ear, encouraging you. Just a thought…