Sorry for taking my time and leaving the discussion to carry on without me... the difficulties of having a debate across different time-zones.
If some thing exists then it will always exist in some form because it would be objectively true that it exists.
As for non-physical existence like consciousness and ideas, its impossible to say that consciousness has a beginning or end. I can only attest to my own consciousness in that there was a time when I was not self aware, but that does not mean self awareness hasn't always existed and it also does not mean that my personal self awareness will come to an end even when I die.
That is not what I was asking. I was asking: "are there things that do not exist?".
Considering your response to essentialsaltes regarding the Colossus of Rhodes, it seems you don't think there are any of such things: as soon as someone mentions it, names it, thinks of it... it "exists". Am I correct in this?
But I'd say you should have to consider that this isn't quite correct. The "existences" are not of an equal form. The "Colossus of Rhodes"... the 30m tall statue depicting the god Helios made of bronze that stands at the entrance of the harbour of Rhodos does not exist. You can go there and look... there isn't a 30m tall Helios- statue made of bronze there.
Now the
memory and the
tales of this statue... these exist. But there are not the same thing, are they?
I was thinking of several thought-experiments to demonstrate that (maybe someone still caught the one originally posted).
Consider this: you think that God exists, the perfect God, the ultimate and infinite God. Loving and just.
Now I say that this God - this same God - is imperfect, limited, spiteful and mean and evil.
According to you, it exists: perfect and imperfect, ultimate and limited, loving and just and mean and evil.
How can that be?
So, no, I have to disagree. What you call "exists in some form" is not necessarily the form that defines what something is. This form can cease to exist.
So according to you, perfect existence involves things that perfectly exist that could go out of perfect existence at any time? So there's no real laws that would govern what comes into perfect existence and what goes out of perfect existence, it's all just random?
Oh, I think that there are laws that govern what comes and goes out of perfect existence. These laws exist and thus are part of perfect existence. And even if it was random (why 'just' random? Is there something less about 'random'?), the randomness would be part of the perfect existence.
Is that so difficult to accept?
So the laws of nature that we observe really shouldn't exist according to your view of perfect existence? Correct me if I'm wrong.
You are wrong.

We do observe these laws, don't we? They exist. And they determine what comes into or goes out of (perfect) existence. So why do you think that according to my view, they shouldn't exist?