# Riiddle me this

You cannot see me, but I am within everything and everyone,
I will never die and I have been with time since long as I can remember.
I am and will ever be what is left when everything dies.

What am I?

• Is the double "i" in the title a typo?
– SMR
Jul 13, 2018 at 6:20
• @SMR it miight be :) Jul 13, 2018 at 6:25

Is it

space ?

I believe this is quite self-explanatory. It is "with time" since the

big bang (see spacetime)

You cannot see it because

you only see what is emitting, reflecting, absorbing or dispersing light. For instance you can see the blue sky, the stars, ... but you cannot see space (just as you cannot see time) ; you can only have a knowledge of variation with space (and/or time), i.e., two different objects at the same time are in different positions in space.

I guess its :

Energy.

You cannot see me, but I am within everything and everyone,

Self explanatory. There is always some energy within everything whether in very small amount or of any kind but is there.

I will never die and I have been with time since long as I can remember.I am and will ever be what is left when everything dies.

Energy can neither be created nor be destroyed.

• Energy can be generated. Jul 13, 2018 at 12:53
• It's just converted from one form to other. I guess generation means the same. @Astralbee Jul 13, 2018 at 12:55

Are you

ever?

You cannot see me, but I am within everything and everyone,

"Ever" is a concept, and thus impossible to see. It is within everything and everyone, though.

I will never die and I have been with time since long as I can remember.

Because you are, well, ever.

I am and will ever be what is left when everything dies.

You are "ever", and will "ever" be, even after everything has died.

For the religious, the answer is

$\dagger$ Lord God; Father of Heaven. $\dagger$ Also, @ManojKumar said it could include spirit / soul.

But putting that aside, could it also be

Nothing?

You cannot see me, but I am within everything and everyone.

You cannot see nothing${}^1$, but it is within everything and everyone (just grab the letters $\verb|n|$ and $\verb|o|$, and then combine it with $\verb|thing|$).
${}^1$@Bass commented below that this is not true if you are pretty much blind; this is the only flaw in my answer, perhaps.

I will never die and have been with time since as long as I can remember.

Eventually, something will die; nothing will never die. The latter part of the sentence is fairly self-explanatory.

I am and will ever be what is left when everything dies.

When everything dies, there is nothing left.

What am I?

Nothing?

Gurer Vf N Tbq

• It can also be Fcvevg/Fbhy(ROT13).
– m4n0
Jul 13, 2018 at 5:52
• A blind person would definitely be able to see that.
– Bass
Jul 13, 2018 at 6:23
• @Bass not necessarily, unless you are fully blind. Jul 13, 2018 at 6:24

Could you be

an atom

You cannot see me, but I am within everything and everyone

Atoms are the basic building block of all matter

I will never die and I have been with time since long as I can remember.

Atoms can decay but do not go out of existence (so I guess technically they don't "die"?)

I am and will ever be what is left when everything dies.

When something dies, its atoms are recycled.

It could be

Ether

As,

It is ever pervasive, invisible, was existing time immemorial and would be there in future as well !

• Except it's been proven to not exist. It also starts with an "A" followed by the rest as is Jul 13, 2018 at 20:04

I believe you are:

Energy.

(this answer has already been given but I didn't agree with the explanations)

You cannot see me

Energy is not visible, until it gives rise to physical matter.

but I am within everything and everyone

We are all composed of physical matter, or atoms. Within every atom is energy.

I will never die

When atoms are destroyed the energy is released

and I have been with time since long as I can remember.

The physical universe was created from energy (no matter where you believe that energy came from). It is generally accepted that the universe had a beginning and that event was an infinite source of energy giving rise to matter, or a source of infinitely dense matter releasing that energy.

As time is connected to matter, it is argued that time as we know it only began with the physical universe.

I am and will ever be what is left when everything dies.

As stated, when physical matter is destroyed, the energy is released. This is what makes atomic energy possible.

• Why did this get a downvote? $(+1)$ Jul 14, 2018 at 1:08
• @user477343 Probably because it was already posted!
– m4n0
Jul 14, 2018 at 1:36