Within a broken heart lie a realm of impenetrable shadows…

“As we survey the challenges of life, that which is easy is rarely right. In fact, the course that we should properly follow appears…

— Thomas S. Monson

When a magician lets you notice something on your own, his lie becomes impenetrable.

— Teller

Hitler was unapproachable and impenetrable even for those in his close company.

— Ian Kershaw

As I glanced at the phraseology of the research report, dull and unfathomable to outsiders like me, I thought that if you have the…

— Jon Ronson

That boy hardly needed a mask when his naked face was already impenetrable.

— Lionel Shriver

“It's like there's a glass wall between us now, invisible but impenetrable”

— Lauren Oliver

Artists probably should have some impenetrable aspects of themselves.

— Simon Callow

That which is impenetrable to us really exists. Behind the secrets of nature remains something subtle, intangible, and inexplicable. Veneration for this force beyond…

— Albert Einstein

I think it's easy to make impenetrable music that nobody can get, and you can hide behind that sometimes.

— Trent Reznor

Nothing is so impenetrable as laughter in a language you don't understand.

— William Golding

For an impenetrable shield, stand inside yourself

— Henry David Thoreau

I can never say 'why' about anything I do. I suppose I can say 'how' and 'when' and 'what.' But 'why' is impenetrable to…

— Paul Auster

Let your plans be dark and impenetrable as night...

— Sun Tzu

However impenetrable it seems, if you don't try it, then you can never do it.

— Andrew Wiles

“It looms before us, an impenetrable wall, trying to crush us, but not yet able to.”

— Anne Frank