Pierre Teilhard de Chardin

It seems to me that terrestrial beings, as they become more autonomous, psychologically richer, shut themselves up in a way against one another, and at the same time gradually become strangers to the cosmic environment and currents, impenetrable to one another, and incapable of exteriorizing themselves.

French Philosopher

Isaac Newton

God in the beginning formed matter in solid, massy, hard, impenetrable, movable particles, of such sizes and figures, and with such other properties, and in such proportion to space, as most conduced to the end for which he formed them.

English Mathematician

Georges Bataille

Crime is a fact of the human species, a fact of that species alone, but it is above all the secret aspect, impenetrable and hidden. Crime hides, and by far the most terrifying things are those which elude us.

French Writer

Coretta Scott King

My story is a freedom song from within my soul. It is a guide to discovery, a vision of how even the worst pain and heartaches can be channeled into human monuments, impenetrable and everlasting.

American Activist

Bill Watterson

The purpose of writing is to inflate weak ideas, obscure pure reasoning, and inhibit clarity. With a little practice, writing can be an intimidating and impenetrable fog!

American Cartoonist

Jenny Ryan

The Vixen character is not quite me. A part of that is putting up this huge front of being strong, impenetrable, really tough and a little bit condescending.

English Celebrity

Seal

I always used to say to my wife, the thing that I loved most about us is that we are a team, we are impenetrable in that respect.

English Musician

Joseph Barber Lightfoot

The future is hidden by a dark impenetrable veil, and yet we struggle to pierce through it.

English Theologian

Simon Callow

Artists probably should have some impenetrable aspects of themselves.

English Actor

Harrison Salisbury

Life within the Kremlin was shrouded in impenetrable secrecy.

American Journalist

Use 'impenetrable' to describe physical objects that can't be passed through.

Physical Barriers

'Impenetrable' can hyperbolically emphasize difficulty even if something isn't literally impassable.

Exaggeration Effect

Use 'impenetrable' for theories or ideas difficult to comprehend, typically in academic contexts.

Complex Concepts

'Impenetrable' may convey that something is complex beyond practical understanding.

Abstract Use

Used metaphorically for someone who doesn't show their emotions or weaknesses.

Emotional Defense

Suggests someone's beliefs or opinions are strongly held, immune to persuasion.

Steadfast Convictions

Highlights the effectiveness of something in blocking out all light.

Absolute Darkness

Can describe window coverings or walls used to prevent anyone from seeing through.

Privacy Use

 Quantum tunneling suggests that a particle can hit an impenetrable barrier, and yet somehow, as though by magic, disappear from one side and reappear on the other. The nicest way of explaining it is if you want to throw a ball over a wall, you have to give it enough energy to get over the top of the wall. In the quantum world, you don't have to throw it over the wall,

How Quantum Biology...

 because it was just impenetrable forest even getting to that point and then well the logistics and all that and we finally had made it and we get here and I'm hanging by this road no again I've never been climbing before it's like geographic just thought it would be fun no they actually paid for climbing

Pink Boots and a Machete...

 that I discovered their plan and the only thing they could really do after they discovered I'd foiled their plan was to go and get a drink at the bar so as I said it's is temperate rainforest this place so it's pretty much impenetrable to go walking

A Quest to Find Canada’s...

 poison tipped arrows on the other side of the river and we are going up this river and high walls of what seems like impenetrable jungle on either side and and as we go deeper into this wild place we see not only are there so-called wild

The Unconquered:...

 the entrance to one of those burrows where I couldn't see him I mean that thicket was impenetrable and that that was where he was going to stay the whole night that I am deeply relieved to tell you that he's back out on the road and I

Safari Live - Day 360 PIPE...

 Some people find it impenetrable without a full book of annotations to help them understand what Joyce is even talking about. But there's a lot of joy to be found in reading it, more than just unpacking allusions and solving puzzles.

Why should you read...

 With only three days left until summer, the wall stood high and impenetrable, with only the gate left to be built. Horrified, the gods realized that not only would they lose their fertility goddess forever,

The myth of Loki and the...

 Why, then, do rocks look and feel solid and hard and impenetrable? As an evolutionary biologist, I'd say our brains have evolved to help us survive within the orders of magnitude, of size and speed

Why the universe seems...

 power even in the sometimes impenetrable halls of the UN machine and data has another power to a power to shine a light on an issue reveal the truth about people's lives even when words and

Lack of data is an issue...

 the adults encircle their yard it's an impenetrable wall of gray