What are quotes from other media that could’ve come directly from Tolkien’s pen?

Here’s mine to start things up:

The truth of a man is found in the darkness, beneath the surface. Some light might reveal only what some men want to be seen.

...

Only the way a man is when he is hidden, is how he is. A shallow glimpse can deceive. Look deep, ponder, and recognize all that is hidden.

This from one of the Myst games (itself a source of many inspiring quotes) and essentially tells you how people can be more complex than how they appear at surface eg. how they behave when no one else is looking. I’d easily imagine it as a nugget of wisdom Gandalf would impart to the Fellowship at any rate.

So, got any quotes you wish to share yourself? The more profound, the better.