Ah since I am "assigned" Idealism ,I would take the task , but please excuse my limiting knowledge and inability to do full justice to the theory.
As Idealism states that physical reality is a mental construct, whatever we are perceiving including that neat ipad lying before me, is an illusion. It is a reflection of my ideas and knowledge. Now to support it , i would recall whatever little quantum mechanics I know ,will use Einstein's argument to say that space and time, the cornerstones of reality, are in themselves just two aspects of a more fundamental spacetime continuum, i.e. they too are created through act of perception and so belong to the world of experiences. They set the framework where we envisage out realities. Hence even an Ipad seems real because of this framework which projects my idea/energy into this illusion. It seems real because of my surety in the independence of space and time.
I think Einstein's theory of relativity bounds matter and energy into it ,which shows that matter doesn't exist in real word. Atomic Physics and Bohr also showed that solid matter didn't exist, rather it is our experience , idea which generates the reality of solid substance , such as Ipad.
So I see ipad because I perceive it , if say I shut my eyes , it still continues to exist because someone else might have also perceived it. Our existence might be someone else's perception. And that, someone else, is what we refer as the absolute.
Ah won't be bad idea to mention the book which first referenced the idea of illusion or "Maya" , quoting Geeta -
"prakrityaiva cha karmani
kriyamanani sarvasah
yah pasyati tathatmanam
akartaram sa pasyati"
"Krishna : One who can see that all activities are performed by the nature (Maya) alone and sees that the self does nothing, actually sees." (The Self is the silent witness).
Idealism basically says everything finite or infinite like time , space are illusions of the absolute.
I doubt, Idealism would be happy to have this shaky confusing argument for establishing its relevance, but well, I tried.
Edited by charminggenie - 11 years ago